Have you looked at McMaster Carr or Granger? When I was working we bought Bristol/Bristo wrenches from them. Also do a search for TechniTool in PA. EdZ KG6UTS
Sent from my iPhone > On Jun 16, 2026, at 10:28, Renee K6FSB via R-390 <[email protected]> > wrote: > > might i suggest next best thing to Bristol spline would be torx which are > not too difficult to obtain and much less chance of cam-out than allen. > Renée, K6FSB > > >> On 6/16/26 10:13 AM, Jacques Fortin via R-390 wrote: >> Hi Fred, >> IF EVER you found a valid source for the Bristol ones, let us know ! >> Allen head ones are more easy to find... >> Use the largest head recess size (3/32"). >> But resist the temptation to buy the Stainless Steel ones: these are less >> "tough" than the black oxide coated steel ones... >> And for the square nuts... I already "made" some from standard 1/4" hex >> nuts. >> File or grind those on three sides. I prefer brass to the steel ones >> however... >> >> 73, Jacques, VE2JFE in Montreal >> >> Aha! I'm looking for six to ten of the 4-40 x 1/2 inch Bristol socket head >> cap screws for the BFO and BW shaft clamps. One square nut (if available) >> would be helpful as well. If not, I'm sure there would be Allen head screws >> at my local hardware store. >> But What didn't work for the ham I got his from was a mix of slotted and >> Phillips screws -- the heads wore out quickly. >> -Fred >> >> ______________________________________________________________ >> R-390 mailing list >> Home: http://mailman.qth.net/mailman/listinfo/r-390 >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > > ______________________________________________________________ > R-390 mailing list > Home: http://mailman.qth.net/mailman/listinfo/r-390 > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ R-390 mailing list Home: http://mailman.qth.net/mailman/listinfo/r-390 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
