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Old 12-01-2019, 01:03 PM   #1
morebeer
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Default Heli coil

Does anyone have a source for 7/16 x 24 heli coils? Got stripped threads on one of the stantions. Thanks
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Old 12-01-2019, 03:38 PM   #2
redmodelt
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Default Re: Heli coil

I just relooked, I don't see anything for that size.
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Old 12-01-2019, 04:17 PM   #3
The Master Cylinder
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Default 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.
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Old 12-01-2019, 04:33 PM   #4
Ernie Vitucci
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Default Re: Heli coil

Good afternoon...You might try 'Bolt Depot' 866-337-9888. Good luck to you. Ernie in Arizona
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Old 12-01-2019, 05:20 PM   #5
Bob C
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Default Re: Heli coil

Snyders and Bratton's show 5/16 x 24 for 1931.
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Old 12-01-2019, 06:25 PM   #6
rotorwrench
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Default 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.
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Old 12-02-2019, 07:54 AM   #7
1crosscut
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Default Re: Heli coil

Unless it is a special bolt/head I would use the standard pitch heli coil and use a different bolt.
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Old 12-03-2019, 07:32 AM   #8
morebeer
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Default Re: Heli coil

Oops. Senior moment. It is 5/16. Thanks
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Old 12-03-2019, 07:17 PM   #9
rotorwrench
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Default 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.
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Old 12-03-2019, 09:27 PM   #10
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Default Re: Heli coil

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