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 <w3...@embarqmail.com> 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
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