Source for 12-20 tap and die

Not listed in MSCs 'specials' which means that's pretty rare.

Any chance you could use 1/4-20?

Jim

Didn't someone say a short time ago here that there's a metric thread which looks an awful lot like #12-20? Something about a motorcycle?

5.5mm x .8mm would look a lot like #12-20. #12 has an OD of .216, and .8mm lead is very close to 20 TPI.

JB

Dave H> > > >>

.*x .03937 (1mm) = .031496. 20 TPi = .050. >018504 difference. .8mm is pretty close to 32 TPI (.03125). .000246 difference. Or about .001 every 4 turns. ERS

I think you may have gotten your math wrong. I think 20 TPI does not come close to .8 mm.

1" = 25.4 mm. 25.4 / 20 = 1.27. That's quite a bit different then .8 mm.

Abrasha

Try Airgas Rutland Tool (they have a website but don't remember the address) have a wide range of specialty taps and dies - should have a #12-20 Cheers John B

Thanks, John! Rutland

the 12-20 tap. It's on backorder, but they'll get it out to me when it comes in.

No die, though. But with a tap I think I can make a die.

Thanks aga>Try Airgas Rutland Tool (they have a website but don't remember the address)