Re: [Elecraft] understanding screw sizes
That's no problem. Didn't you know that you can just turn the right-hand ones upside down? Of course, sockets are another story. On 4/9/2011 6:17 PM, Paul Saville wrote: > It amuses us in "Metric World" to pretend we don't understand non-metric > thread sizes. Fact is I still have AF, Whitworth and metric wrench and > socket sets in the workshop. The metrics get used the most though. The > only time I get caught out is with left-hand threaded parts, because I > don't have a full set of left-handed wrenches. > > 73 Paul ZL3IN -- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes [END of thread]
Let's let this thread rest for now. 73, Eric List Moderator www.elecraft.com _..._ On Apr 9, 2011, at 2:08 PM, Guy Olinger K2AV wrote: >> going metric ... inch by inch. > > USA went to liters from quarts in "family size" carbonated beverage > containers when the companies discovered they could downsize just > slightly and charge the same. > > I discovered the truth about metric threads trying to replace some > metric screws that I dropped in the leaves. > > BSC? Whitworth? I only ever had Japanese motorcycles. > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
Paul, For left-handed threads, just reverse the lever on the socket wrench! Let's see -- the left handed monkey wrench is one of those rare instruments. 73, Don W3FPR On 4/9/2011 9:17 PM, Paul Saville wrote: > It amuses us in "Metric World" to pretend we don't understand non-metric > thread sizes. Fact is I still have AF, Whitworth and metric wrench and > socket sets in the workshop. The metrics get used the most though. The > only time I get caught out is with left-hand threaded parts, because I > don't have a full set of left-handed wrenches. > > 73 Paul ZL3IN > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
It amuses us in "Metric World" to pretend we don't understand non-metric thread sizes. Fact is I still have AF, Whitworth and metric wrench and socket sets in the workshop. The metrics get used the most though. The only time I get caught out is with left-hand threaded parts, because I don't have a full set of left-handed wrenches. 73 Paul ZL3IN > ...Sorry for those in "Metric Land" who do not understand the US > hardware system. We tried to go metric many years ago and failed. > Most of the auto industry is now metric, but for small hardware, the > US sizes predominate here. We have to keep two sets of wrenches if > we are to have a complete set. > > 73, Don W3FPR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
On 4/9/2011 2:15 PM, Kevin Rock wrote: > Changing the cardboard on the garage floor was a monthly ritual for my > BSA, Ariel, and Triumph. I miss them :( A dear departed friend of mine was an owner/driver/rebuilder of Jag-u-ars (former aircraft engine mechanic on SAC B-36 planes) and he convinced me that Jag engines were supposed to leak. He had three of them for his wife's "saloon car" - one in the car, one on standby, and one up on the chain hoist being worked on. After he died (too young) his wife sold the car because she couldn't deal with it. I could never convince him to get involved in ham radio, so he never owned an Elecraft product. -- 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
Regarding machine screw sizes, American Standard. Screw numbers start out at o which has an OD of .060 inch. Each successive number has .013 inch added to it to arrive at its OD. Thus a number 1 screw has an OD of .073 inch, a number 2 screw has an OD of .086 inch, and so on . Hope I presented this well. Gil K8EAG > > Thanks for the explanation Don, I had it mostly figured out by doing an > inventory and reading that wikipedia page. > If I may suggest, your words could be adapted to expand pages 7-8 of the > assembly manual and save us metric types some headscratching. > > Pf > >> > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
You missed the joy of tickling the Amal carbs, setting the spark advance, pulling the compression release, oil leaks, and Lighting by Lucas: Prince of Darkness :) Changing the cardboard on the garage floor was a monthly ritual for my BSA, Ariel, and Triumph. I miss them :( 73, Kevin. KD5ONS On Sat, 09 Apr 2011 14:08:26 -0700, Guy Olinger K2AV wrote: >> going metric ... inch by inch. > > USA went to liters from quarts in "family size" carbonated beverage > containers when the companies discovered they could downsize just > slightly and charge the same. > > I discovered the truth about metric threads trying to replace some > metric screws that I dropped in the leaves. > > BSC? Whitworth? I only ever had Japanese motorcycles. > > 73, Guy. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
> going metric ... inch by inch. USA went to liters from quarts in "family size" carbonated beverage containers when the companies discovered they could downsize just slightly and charge the same. I discovered the truth about metric threads trying to replace some metric screws that I dropped in the leaves. BSC? Whitworth? I only ever had Japanese motorcycles. 73, Guy. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
Thanks for the explanation Don, I had it mostly figured out by doing an inventory and reading that wikipedia page. If I may suggest, your words could be adapted to expand pages 7-8 of the assembly manual and save us metric types some headscratching. Pf > "Don" == Don Wilhelm writes: Don> Pf, Most of the screws in the K3 are #4, and the thread size Don> is in turns per inch (4-40). These are standard sizes here in Don> the US - no metric size hardware is used in the K3 as far as I Don> know. You have the reference link correct. Don> There is also some #2 hardware used in the K3 - it is the Don> smaller diameter, and has 56 threads per inch (2-56). Don> #6 hardware has a larger diameter and will have 32 threads per Don> inch (6-32) Don> The length of the screw threads will change depending on Don> whether the head is flat or not. For flathead screws, measure Don> the entire length of the screw including the head. For the Don> others, measure from the head to the end of the screw. Don> The washers are designated by the size of the hole. Other Don> dimensions may exist if important, but often just the hole size Don> and the washer type (flat, internal tooth lockwasher, split Don> lockwasher) suffice for the description. Don> Sorry for those in "Metric Land" who do not understand the US Don> hardware system. We tried to go metric many years ago and Don> failed. Most of the auto industry is now metric, but for small Don> hardware, the US sizes predominate here. We have to keep two Don> sets of wrenches if we are to have a complete set. Don> 73, Don W3FPR Don> On 4/9/2011 1:51 AM, Pierfrancesco Caci wrote: >> Hello, while lenght of the screws is given in the manual in mm >> also, I'm trying to figure out how to read the screw and washer >> diameters that are given as "4-40" and such. Is this the relevant >> standard? http://en.wikipedia.org/wiki/Unified_Thread_Standard >> >> For washers, the first number should be the size of the hole, >> right? >> >> Pf >> >> >> -- Pierfrancesco Caci, ik5pvx __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
Hi Pete, Well sort of... The tank and some Amal carb stuff did but the bike itself had BSC (British Standard Cycle) threading. It was based on Whitworth thread angles but was a fine thread system that "most" of were 26tpi. Then of course there are your BA (British Association) threads that were used for small screws on the electrical items. These were actually based on old French metric threads, not Whitworth That is how it was even on my 1st, a 47 Ariel. And ones I still have, Norton, Matchless, Royal Enfield, and my older Triumphs. 73, Bob K2TK ex KN2TKR (1956) & K2TKR On 4/9/2011 1:10 PM, Pete F5VNB wrote: > Whitworth? Luxury! > My first motorcycle, a Triumph, had nuts with a BSP thread - British > Standard Pipe. > > 73, Pete G4PLZ/F5VNB > > > On 09/04/2011 17:02, Kevin Rock wrote: >> No one has mentioned the other set of tools required to work on British >> bikes: Whitworth. Yes, I have three sets of tools to work on American, >> Japanese, and British gear. Now tell me how the threads are the same on >> metric bolts from across the world. From what I have learned there is no >> standard for metric threads. German and Japanese equipment do not >> necessarily use interchangeable hardware. >>73, >> Kevin. KD5ONS >> >> >> On Sat, 09 Apr 2011 07:43:40 -0700, Matt Zilmer >> wrote: >> >>> Small addition / correction. >>> >>> Nearly all consumer electronics is produced using metric hardware, >>> mainly because it comes from Asian sources. With the exception of the >>> odd drive types (Torx, one-way, etc.), the sizes roughly approximate >>> the American standards in terms of TPI, torque settings, etc. >>> >>> As Don points out, one has to have a double set of tools for some of >>> this, but generally a screwdriver is a screwdriver. Nutdrivers and >>> sockets, nope. >>> >>> I was forced many years ago to buy dual sets of combination wrenches >>> and 3/8" / 1/2" inch sockets for automotive work I did as a hobby. If >>> you do this, buy Craftsman or Snap On. >>> >>> 73, >>> matt >>> >>> >>> On Sat, 09 Apr 2011 08:43:22 -0400, you wrote: >>> Pf, Most of the screws in the K3 are #4, and the thread size is in turns per inch (4-40). These are standard sizes here in the US - no metric size hardware is used in the K3 as far as I know. You have the reference link correct. There is also some #2 hardware used in the K3 - it is the smaller diameter, and has 56 threads per inch (2-56). #6 hardware has a larger diameter and will have 32 threads per inch (6-32) The length of the screw threads will change depending on whether the head is flat or not. For flathead screws, measure the entire length of the screw including the head. For the others, measure from the head to the end of the screw. The washers are designated by the size of the hole. Other dimensions may exist if important, but often just the hole size and the washer type (flat, internal tooth lockwasher, split lockwasher) suffice for the description. Sorry for those in "Metric Land" who do not understand the US hardware system. We tried to go metric many years ago and failed. Most of the auto industry is now metric, but for small hardware, the US sizes predominate here. We have to keep two sets of wrenches if we are to have a complete set. 73, Don W3FPR On 4/9/2011 1:51 AM, Pierfrancesco Caci wrote: > Hello, > while lenght of the screws is given in the manual in mm also, I'm > trying to figure out how to read the screw and washer diameters > that are given as "4-40" and such. Is this the relevant standard? > http://en.wikipedia.org/wiki/Unified_Thread_Standard > > For washers, the first number should be the size of the hole, right? > > Pf > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
Whitworth? Luxury! My first motorcycle, a Triumph, had nuts with a BSP thread - British Standard Pipe. 73, Pete G4PLZ/F5VNB On 09/04/2011 17:02, Kevin Rock wrote: > No one has mentioned the other set of tools required to work on British > bikes: Whitworth. Yes, I have three sets of tools to work on American, > Japanese, and British gear. Now tell me how the threads are the same on > metric bolts from across the world. From what I have learned there is no > standard for metric threads. German and Japanese equipment do not > necessarily use interchangeable hardware. > 73, > Kevin. KD5ONS > > > On Sat, 09 Apr 2011 07:43:40 -0700, Matt Zilmer > wrote: > >> Small addition / correction. >> >> Nearly all consumer electronics is produced using metric hardware, >> mainly because it comes from Asian sources. With the exception of the >> odd drive types (Torx, one-way, etc.), the sizes roughly approximate >> the American standards in terms of TPI, torque settings, etc. >> >> As Don points out, one has to have a double set of tools for some of >> this, but generally a screwdriver is a screwdriver. Nutdrivers and >> sockets, nope. >> >> I was forced many years ago to buy dual sets of combination wrenches >> and 3/8" / 1/2" inch sockets for automotive work I did as a hobby. If >> you do this, buy Craftsman or Snap On. >> >> 73, >> matt >> >> >> On Sat, 09 Apr 2011 08:43:22 -0400, you wrote: >> >>> Pf, >>> >>> Most of the screws in the K3 are #4, and the thread size is in turns per >>> inch (4-40). These are standard sizes here in the US - no metric size >>> hardware is used in the K3 as far as I know. >>> You have the reference link correct. >>> >>> There is also some #2 hardware used in the K3 - it is the smaller >>> diameter, and has 56 threads per inch (2-56). >>> >>> #6 hardware has a larger diameter and will have 32 threads per inch >>> (6-32) >>> >>> The length of the screw threads will change depending on whether the >>> head is flat or not. For flathead screws, measure the entire length of >>> the screw including the head. For the others, measure from the head to >>> the end of the screw. >>> >>> The washers are designated by the size of the hole. Other dimensions >>> may exist if important, but often just the hole size and the washer type >>> (flat, internal tooth lockwasher, split lockwasher) suffice for the >>> description. >>> >>> Sorry for those in "Metric Land" who do not understand the US hardware >>> system. We tried to go metric many years ago and failed. Most of the >>> auto industry is now metric, but for small hardware, the US sizes >>> predominate here. We have to keep two sets of wrenches if we are to >>> have a complete set. >>> >>> 73, >>> Don W3FPR >>> >>> On 4/9/2011 1:51 AM, Pierfrancesco Caci wrote: Hello, while lenght of the screws is given in the manual in mm also, I'm trying to figure out how to read the screw and washer diameters that are given as "4-40" and such. Is this the relevant standard? http://en.wikipedia.org/wiki/Unified_Thread_Standard For washers, the first number should be the size of the hole, right? Pf >>> __ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:Elecraft@mailman.qth.net >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
If there were a standard for metric threads around the world it would speed the adoption of metric nuts and bolts in the US. As it is I can purchase bolts from Houston and nuts from Cleveland and know they will mate. The same is not true if I buy nuts in Japan and try to mate them with bolts from Germany. They may or may not work together. 73, Kevin. KD5ONS On Sat, 09 Apr 2011 09:09:35 -0700, Fred Jensen wrote: > On 4/9/2011 5:43 AM, Don Wilhelm wrote: >> >> Sorry for those in "Metric Land" who do not understand the US hardware >> system. We tried to go metric many years ago and failed. > > Not really true, Don. It is slow, but here in the Colonies, we *are* > going metric ... inch by inch. > > 73, > > Fred K6DGW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
On 4/9/2011 5:43 AM, Don Wilhelm wrote: > > Sorry for those in "Metric Land" who do not understand the US hardware > system. We tried to go metric many years ago and failed. Not really true, Don. It is slow, but here in the Colonies, we *are* going metric ... inch by inch. 73, Fred K6DGW - Northern California Contest Club - CU in the 2011 Cal QSO Party 1-2 Oct 2011 - www.cqp.org __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
Two sets of wrenches? How are you going to work on 1953 MGs and other British antiques without Whitworth? Willis 'Cookie' Cooke K5EWJ From: Don Wilhelm To: Pierfrancesco Caci Cc: elecraft@mailman.qth.net Sent: Sat, April 9, 2011 7:43:22 AM Subject: Re: [Elecraft] understanding screw sizes Pf, Most of the screws in the K3 are #4, and the thread size is in turns per inch (4-40). These are standard sizes here in the US - no metric size hardware is used in the K3 as far as I know. You have the reference link correct. There is also some #2 hardware used in the K3 - it is the smaller diameter, and has 56 threads per inch (2-56). #6 hardware has a larger diameter and will have 32 threads per inch (6-32) The length of the screw threads will change depending on whether the head is flat or not. For flathead screws, measure the entire length of the screw including the head. For the others, measure from the head to the end of the screw. The washers are designated by the size of the hole. Other dimensions may exist if important, but often just the hole size and the washer type (flat, internal tooth lockwasher, split lockwasher) suffice for the description. Sorry for those in "Metric Land" who do not understand the US hardware system. We tried to go metric many years ago and failed. Most of the auto industry is now metric, but for small hardware, the US sizes predominate here. We have to keep two sets of wrenches if we are to have a complete set. 73, Don W3FPR On 4/9/2011 1:51 AM, Pierfrancesco Caci wrote: > Hello, > while lenght of the screws is given in the manual in mm also, I'm > trying to figure out how to read the screw and washer diameters > that are given as "4-40" and such. Is this the relevant standard? > http://en.wikipedia.org/wiki/Unified_Thread_Standard > > For washers, the first number should be the size of the hole, right? > > Pf > > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
No one has mentioned the other set of tools required to work on British bikes: Whitworth. Yes, I have three sets of tools to work on American, Japanese, and British gear. Now tell me how the threads are the same on metric bolts from across the world. From what I have learned there is no standard for metric threads. German and Japanese equipment do not necessarily use interchangeable hardware. 73, Kevin. KD5ONS On Sat, 09 Apr 2011 07:43:40 -0700, Matt Zilmer wrote: > Small addition / correction. > > Nearly all consumer electronics is produced using metric hardware, > mainly because it comes from Asian sources. With the exception of the > odd drive types (Torx, one-way, etc.), the sizes roughly approximate > the American standards in terms of TPI, torque settings, etc. > > As Don points out, one has to have a double set of tools for some of > this, but generally a screwdriver is a screwdriver. Nutdrivers and > sockets, nope. > > I was forced many years ago to buy dual sets of combination wrenches > and 3/8" / 1/2" inch sockets for automotive work I did as a hobby. If > you do this, buy Craftsman or Snap On. > > 73, > matt > > > On Sat, 09 Apr 2011 08:43:22 -0400, you wrote: > >> Pf, >> >> Most of the screws in the K3 are #4, and the thread size is in turns per >> inch (4-40). These are standard sizes here in the US - no metric size >> hardware is used in the K3 as far as I know. >> You have the reference link correct. >> >> There is also some #2 hardware used in the K3 - it is the smaller >> diameter, and has 56 threads per inch (2-56). >> >> #6 hardware has a larger diameter and will have 32 threads per inch >> (6-32) >> >> The length of the screw threads will change depending on whether the >> head is flat or not. For flathead screws, measure the entire length of >> the screw including the head. For the others, measure from the head to >> the end of the screw. >> >> The washers are designated by the size of the hole. Other dimensions >> may exist if important, but often just the hole size and the washer type >> (flat, internal tooth lockwasher, split lockwasher) suffice for the >> description. >> >> Sorry for those in "Metric Land" who do not understand the US hardware >> system. We tried to go metric many years ago and failed. Most of the >> auto industry is now metric, but for small hardware, the US sizes >> predominate here. We have to keep two sets of wrenches if we are to >> have a complete set. >> >> 73, >> Don W3FPR >> >> On 4/9/2011 1:51 AM, Pierfrancesco Caci wrote: >>> Hello, >>> while lenght of the screws is given in the manual in mm also, I'm >>> trying to figure out how to read the screw and washer diameters >>> that are given as "4-40" and such. Is this the relevant standard? >>> http://en.wikipedia.org/wiki/Unified_Thread_Standard >>> >>> For washers, the first number should be the size of the hole, right? >>> >>> Pf >>> >>> >>> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
No one has mentioned the other set of tools required to work on British bikes: Whitworth. Yes, I have three sets of tools to work on American, Japanese, and British gear. Now tell me how the threads are the same on metric bolts from across the world. From what I have learned there is no standard for metric threads. German and Japanese equipment do not necessarily use interchangeable hardware. 73, Kevin. KD5ONS On Sat, 09 Apr 2011 07:43:40 -0700, Matt Zilmer wrote: > Small addition / correction. > > Nearly all consumer electronics is produced using metric hardware, > mainly because it comes from Asian sources. With the exception of the > odd drive types (Torx, one-way, etc.), the sizes roughly approximate > the American standards in terms of TPI, torque settings, etc. > > As Don points out, one has to have a double set of tools for some of > this, but generally a screwdriver is a screwdriver. Nutdrivers and > sockets, nope. > > I was forced many years ago to buy dual sets of combination wrenches > and 3/8" / 1/2" inch sockets for automotive work I did as a hobby. If > you do this, buy Craftsman or Snap On. > > 73, > matt > > > On Sat, 09 Apr 2011 08:43:22 -0400, you wrote: > >> Pf, >> >> Most of the screws in the K3 are #4, and the thread size is in turns per >> inch (4-40). These are standard sizes here in the US - no metric size >> hardware is used in the K3 as far as I know. >> You have the reference link correct. >> >> There is also some #2 hardware used in the K3 - it is the smaller >> diameter, and has 56 threads per inch (2-56). >> >> #6 hardware has a larger diameter and will have 32 threads per inch >> (6-32) >> >> The length of the screw threads will change depending on whether the >> head is flat or not. For flathead screws, measure the entire length of >> the screw including the head. For the others, measure from the head to >> the end of the screw. >> >> The washers are designated by the size of the hole. Other dimensions >> may exist if important, but often just the hole size and the washer type >> (flat, internal tooth lockwasher, split lockwasher) suffice for the >> description. >> >> Sorry for those in "Metric Land" who do not understand the US hardware >> system. We tried to go metric many years ago and failed. Most of the >> auto industry is now metric, but for small hardware, the US sizes >> predominate here. We have to keep two sets of wrenches if we are to >> have a complete set. >> >> 73, >> Don W3FPR >> >> On 4/9/2011 1:51 AM, Pierfrancesco Caci wrote: >>> Hello, >>> while lenght of the screws is given in the manual in mm also, I'm >>> trying to figure out how to read the screw and washer diameters >>> that are given as "4-40" and such. Is this the relevant standard? >>> http://en.wikipedia.org/wiki/Unified_Thread_Standard >>> >>> For washers, the first number should be the size of the hole, right? >>> >>> Pf >>> >>> >>> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
Small addition / correction. Nearly all consumer electronics is produced using metric hardware, mainly because it comes from Asian sources. With the exception of the odd drive types (Torx, one-way, etc.), the sizes roughly approximate the American standards in terms of TPI, torque settings, etc. As Don points out, one has to have a double set of tools for some of this, but generally a screwdriver is a screwdriver. Nutdrivers and sockets, nope. I was forced many years ago to buy dual sets of combination wrenches and 3/8" / 1/2" inch sockets for automotive work I did as a hobby. If you do this, buy Craftsman or Snap On. 73, matt On Sat, 09 Apr 2011 08:43:22 -0400, you wrote: > Pf, > >Most of the screws in the K3 are #4, and the thread size is in turns per >inch (4-40). These are standard sizes here in the US - no metric size >hardware is used in the K3 as far as I know. >You have the reference link correct. > >There is also some #2 hardware used in the K3 - it is the smaller >diameter, and has 56 threads per inch (2-56). > >#6 hardware has a larger diameter and will have 32 threads per inch (6-32) > >The length of the screw threads will change depending on whether the >head is flat or not. For flathead screws, measure the entire length of >the screw including the head. For the others, measure from the head to >the end of the screw. > >The washers are designated by the size of the hole. Other dimensions >may exist if important, but often just the hole size and the washer type >(flat, internal tooth lockwasher, split lockwasher) suffice for the >description. > >Sorry for those in "Metric Land" who do not understand the US hardware >system. We tried to go metric many years ago and failed. Most of the >auto industry is now metric, but for small hardware, the US sizes >predominate here. We have to keep two sets of wrenches if we are to >have a complete set. > >73, >Don W3FPR > >On 4/9/2011 1:51 AM, Pierfrancesco Caci wrote: >> Hello, >> while lenght of the screws is given in the manual in mm also, I'm >> trying to figure out how to read the screw and washer diameters >> that are given as "4-40" and such. Is this the relevant standard? >> http://en.wikipedia.org/wiki/Unified_Thread_Standard >> >> For washers, the first number should be the size of the hole, right? >> >> Pf >> >> >> >__ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
The really bizarre fact is that our Congress adopted Metric as the US "Standard" system of weights and measures in the 1800's but they failed to pass a law requiring its use. Ron (been converting between the systems all my life and not loving it) AC7AC -Original Message- ...Sorry for those in "Metric Land" who do not understand the US hardware system. We tried to go metric many years ago and failed. Most of the auto industry is now metric, but for small hardware, the US sizes predominate here. We have to keep two sets of wrenches if we are to have a complete set. 73, Don W3FPR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] understanding screw sizes
Pf, Most of the screws in the K3 are #4, and the thread size is in turns per inch (4-40). These are standard sizes here in the US - no metric size hardware is used in the K3 as far as I know. You have the reference link correct. There is also some #2 hardware used in the K3 - it is the smaller diameter, and has 56 threads per inch (2-56). #6 hardware has a larger diameter and will have 32 threads per inch (6-32) The length of the screw threads will change depending on whether the head is flat or not. For flathead screws, measure the entire length of the screw including the head. For the others, measure from the head to the end of the screw. The washers are designated by the size of the hole. Other dimensions may exist if important, but often just the hole size and the washer type (flat, internal tooth lockwasher, split lockwasher) suffice for the description. Sorry for those in "Metric Land" who do not understand the US hardware system. We tried to go metric many years ago and failed. Most of the auto industry is now metric, but for small hardware, the US sizes predominate here. We have to keep two sets of wrenches if we are to have a complete set. 73, Don W3FPR On 4/9/2011 1:51 AM, Pierfrancesco Caci wrote: > Hello, > while lenght of the screws is given in the manual in mm also, I'm > trying to figure out how to read the screw and washer diameters > that are given as "4-40" and such. Is this the relevant standard? > http://en.wikipedia.org/wiki/Unified_Thread_Standard > > For washers, the first number should be the size of the hole, right? > > Pf > > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] understanding screw sizes
Hello, while lenght of the screws is given in the manual in mm also, I'm trying to figure out how to read the screw and washer diameters that are given as "4-40" and such. Is this the relevant standard? http://en.wikipedia.org/wiki/Unified_Thread_Standard For washers, the first number should be the size of the hole, right? Pf -- Pierfrancesco Caci, ik5pvx __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
