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Old 13th Feb 2022, 2:06 am   #6
emeritus
Dekatron
 
Join Date: Jan 2012
Location: Brentwood, Essex, UK.
Posts: 5,356
Default Re: Nut & Bolt Thread Compilation Identifier Chart.

Re #2, this is an extract from the 1942 edition of Machinery's Handbook that has data on the then-current and then-obsolescent US screw thread systems. I have posted it here before but I can't find the thread I posted it on.
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File Type: pdf 1942 US threads (1).pdf (950.6 KB, 60 views)
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