19-03-2023, 08:28 PM
(This post was last modified: 19-03-2023, 08:29 PM by Stuart Giles.)
(18-03-2023, 07:33 PM)MartinH Wrote: I agree 3/16BSF have become very hard to find.
In a non critical application buy M5 and run a BSF die over them to shave a bit off. The pitch is almost identical, you just need to take 0.2mm off the diameter.
10-32 UNF fasteners are in practical terms directly interchangeable with 3/16" BSF as they are both 32 TPI. 10-32 screws are a lot easier to find than BSF fasteners.
Theoretical purists will point out that the thread angles differ, pretty well all US fasteners having a 60 degree angle, whereas British Standard anything threads (except Cycle) have a 55 degree thread angle. 3/16" fasteners are usually just used for attaching bits and bobs, if that's not the case, then matching the male and female threads really does matter.