Heli coil
 

Does anyone have a source for 7/16 x 24 heli coils? Got stripped threads on one of the stantions. Thanks

Re: Heli coil
 

I just relooked, I don't see anything for that size.

Re: Heli coil
 

7/16-24, that's an odd size isn't it? UNS? I see only 7/16-14 and 7/16-20 at McMaster-Carr.

Re: Heli coil
 

Good afternoon...You might try 'Bolt Depot' 866-337-9888. Good luck to you. Ernie in Arizona

Re: Heli coil
 

Snyders and Bratton's show 5/16 x 24 for 1931.

Re: Heli coil
 

That size reminds me of the british cycle thread. All diameters were 26 thread per inch. The Unified National Standard sizes are in between the UNC and UNF sizes and Harley Davidson is the only manufacturer that I know of that used them but they still would not have a 7/16 X 24 size.

There were different pitch sizes between 28/29 and 30/31 but they were all 5/16". What stanchion do you have there? A lot of these old cars have had the Rube Goldberg treatment at one time or another.

Re: Heli coil
 

Unless it is a special bolt/head I would use the standard pitch heli coil and use a different bolt.

Re: Heli coil
 

Oops. Senior moment. It is 5/16. Thanks

Re: Heli coil
 

5/16 X 24 UNF helicoils are available from a lot of sources. The kit has all the stuff you would need unless you just need the coils. Coils are available separately too. Many chain auto parts stores carry them and there are several brands.

Re: Heli coil
 

You need the tap and installation tool which come in the kit.