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| What bolt type please? |
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| beanflying:
--- Quote from: eugene on June 23, 2022, 03:33:36 pm ---I count 12 threads per cm, not 13, and it looks smaller than 5 mm diameter to me. I'm nearly certain that it's a 10-32 screw, 7/8" long. The head is smaller than a typical pan head (probably came from something mass produced.) If the space for the head is small diameter and a pan head won't fit, a fillister head might. And I disagree that M5x0.8 and 10-32 are interchangeable. Maybe in soft plastic where you can force a new set of threads, or with narrow nuts that only have a few threads, but generally, no. --- End quote --- As it is likely a rolled thread it will be a smaller diameter than nominal regardless. 10-32 as a guess without is being of US origin equipment would be fairly unlikely in the UK where it is 'maybe' a 2BA (31.4 TPI - only an Englishman could make that up :-DD ) This is really why spending $20-30 on calipers and pitch gauges make sense. Metric would still be a place to start and easy to get and try. |
| Benta:
Certainly not metric. I also count 12/cm, giving a pitch of ~0.833 mm. Could be anything. The head is really odd. What did it come out of? EDIT: found it. It's a Bodmer thread for old/historic optical instruments. That also explains the strange head and the thread angles. https://www.gewinde-normen.de/en/bodmer-thread.html |
| TimFox:
--- Quote from: Zoli on June 23, 2022, 06:31:42 pm --- --- Quote from: TimFox on June 23, 2022, 05:33:23 pm ---1/32 inch = 0.7938 mm The 0.00625 mm mismatch would be one full pitch in 160 turns = 128 mm = 5 inch. --- End quote --- If you need to swap screw+thread that long, you have a bigger problem on your hand. But thank you anyway to calculate the theoretical limit; I prefer the practical limit, which in real life means interchangeable for me(at least for 20mm~3/4"). --- End quote --- That was my point. You will never see a thread engagement of several inches, and 3/4" is rare. |
| eti:
--- Quote from: BrokenYugo on June 23, 2022, 05:51:41 pm ---What is it from? Looks to me like cheap furniture hardware, which is usually metric. M5 is a good bet. At least around me, anywhere that sells bulk hardware has a rack with nuts and studs in all the common threads, for matching up mystery parts. --- End quote --- It's from a frying pan (the picture) but I needed one for my saucepan, which rusted right through; thankfully I found out when it was empty, emerging from the dishwasher! Thanks to everyone for your help. I now have a replacement from a mechanical engineer neighbour! |
| Benta:
I feel @eti made a fool out of everyone here. Frying pan, indeed! You're on my block list. |
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