At 11:43 AM 12/6/2005, you wrote: >Could somebody well versed in the secrets of the Imperial system tell me: > >1 - When a thread size is expressed at, say, 10-32, what do the "10" and >the "32" stand for?
My Tony Bingelis book with all the good info is loaned out at the moment but here are the basics: 10-32 is the "fine thread" series of bolts as used in aircraft. It is 3/16" in diameter with 32 threads per inch. It is usually referred to as an AN3, indicating it's diameter in 1/16's of an inch. The next size larger would be an AN4 (4/16" or 1/4 inch). The dash number following the AN3 would indicate the length in 1/8" increments The A , H, or no letter following the - number indicates whether the bolt has a drilled head, a drilled shank, or not drilled at all. >2 - The AN system starts at AN3, which is 10-32. What would be the next >smaller size in the standard Imperial system? The next size smaller here in the U.S.A. would be a #8 with 36 threads per inch. I'm GUESSING that to be a 1/8" bolt / screw so whatever your equivalent to .125" should be close. We don't use that size on anything structural. What is your intended use? Larry Flesner
