Where to buy 3/4"-20 die?

[Mossimo777]

Spindle threads on my '68 got a ding in them from sitting around w/o a nut and I want to clean it up. Can't seem to find a 3/4"-20 die anywhere. Anyone know where I can find one? If not I could always use a thread file.

[Apogee]

Thread file is going to be your best bet since 3/4-16 is going to be the standard fine die thread for that nominal size. Another option would be to chuck it up in a lathe and chase the threads that way, that is after all how it was probably made to begin with. It's not like a standard fastener where the threads are preloaded to a percentage of yield, so they don't have to be perfect to function as intended.

Tobin
KORE3

[Twentyover]

3/4-20 is a standard thread (UNEF). maybe try an aircraft supply place?

[David Sloan]

http://www.mcmaster.com/#

Hope this helps


Spindle threads on my '68 got a ding in them from sitting around w/o a nut and I want to clean it up. Can't seem to find a 3/4"-20 die anywhere. Anyone know where I can find one? If not I could always use a thread file.

[Apogee]

Yes, 3/4-20 is a "standard" UNEF thread designation. The dies exist, they're just not common place. You can't walk into Sears and buy one, however if you really want one and don't mind dropping the cash to make it happen, then you can certainly find one. After a quick Google search, here's a British company selling them for about $50 each: http://www.engineering-supplies.com/subcat.asp?id=283

Here's another at almost double the price: http://www.threadtools.com/Products/34x20-UNEF-Die__D2328pnt.aspx

Tobin

[68sixspeed]

www.mscdirect.com

mcmaster is also good too.

[Twentyover]

Wow- a bunch spendier than what I would have anticipated.....

Maybe a Plan B-
Can you find a replacement nut? If so, can you dremel out notches in the thread, then heat it red hot and quench it? Trying to make a cheap single pass die from the nut.

Initial thought was take it to an A & P aircraft shop- those guys love weird threads, they may have a die and run it down the spindle....

[Mossimo777]

Thanks guys. I am looking into this right now.

[brans72]

try mac tools,matco etc they make a thread cleaner tool for axles etc there cheap to less the $100 bucks for the set and can help clean the threads up used it on imports be fore and american cars!!!!

[David Pozzi]

If it's just a thread ding, use a thread file on it.

[Mossimo777]

Thread file worked great! Thanks for all the help.