Are there any examples of coincidental intercompatibility between the major screw thread types? (ISO, BSW, UTS, etc.)
By intercompatibility, I mean, are there any cases where a nut of size X in thread standard Y fits properly (without crossing, binding or being intolerably loose) on a bolt of size P in thread standard Q?
5mm-.8 and #10-32 can be reasonably interchanged.
Am I the only one who read this title to mean “to hell with SDMB thread regulations”?
No.
Perhaps a kindly mod could re-word the title to “Standards for threads of machine screws…”?
No, leave it. I think IMHO and MPSIMS complement each other nicely.
From bitter experience I can state that the most likely result of attempts at such mixing are cross-threading, bindinbg, and letti ng loose at inconvenient times. Although a rare few might seem to be comptible, it’s realy best not to mix breeds.
I checked that out. The # 10 nut didn’t want to screw on the 5 mm very well. I think it could be forced. A 5 mm nut did easily screw on a #10 screw. I wouldn’t be surprised if it stripped easily too.
I first noticed how well a 5/8’’ wrench fit a 16 mm nut. Of course as you halve it or double it, it still works well from 5/32’’ to 5/4’’. I am sure the cap on the oil filter cartridge on my 02 Cavalier Ecotec was designed to fit a 32 mm socket. My old 5/4’’ socket fits fine. I have long used 15/16’’ wrenches on the 24 mm plugs on my truck. 19mm is very close to 3/4’’. Some lug wrenches are marked 19 mm, 3/4 ‘’.
One that can trick you. The 10mm 1.0 brake line nuts only look very close to the 3/8’’-24 ones.
I sometimes take advantage of the 5/16’’-8mm thing. It is easy to find 5/16’’ rod. They take an 8mm-1.25 thread very well. Thus I don’t have to use inch crap on my all metric truck.
I got caught out by this (or something very similar) a few months ago. Went to get some brake unions but the fools at a local car parts supplier must have had some mixed up in a box, as I found out once I started putting the pipes back on. Swine.