In my bygone days of drafting, the most common American sizes I saw on drawings were 10-32 and 1/4-20. I don't recall if I ever saw a 12-24 called out, but I remember noticing that everybody used 10-32 and 1/4-20. Although it's common for us in equipment racks, it might truly be "odd" for the general population.
My local Home Depot seems to have small packets of 12-24. Not a box of 100 though. 12-24 is used with some cage nuts and some racks, so I'd assume anyone who sells rack hardware will have a big box of them available. ShowMeCables or Rack Solutions, etc. Probably longer than 1/2" though. -Adam ________________________________ From: AF <[email protected]> on behalf of Ken Hohhof <[email protected]> Sent: Tuesday, June 10, 2025 12:33 AM To: 'AnimalFarm Microwave Users Group' <[email protected]> Subject: [AFMUG] is 12-24 an oddball screw size? I went to Ace Hardware today looking for a box of 12-24 x 3/8 or 1/2 pan head Philips machine screws, I had a box of 100 that I had used up. The box said Hillman and I’m almost positive I bought it at Ace. They had sizes from 4-40 to 10-32 and even 10-24, then it jumped to 1/4-20. Figuring my eyes or my brain were failing me, I asked someone for help, and he told me 12-24 is an oddball size. He did find some in the specialty screw drawers but at $0.45 each. When did 12-24 become an oddball size? I mostly use M6 now for rack screws, but I use 12-24 for things like attaching DIN rail to backplates. My trusty Greenlee tap set isn’t metric so I can’t use M6. I’m sure I could order some from McMaster, I was just surprised the hardware store didn’t have them in the bins.
-- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
