General Category > Quadrajet Carb Talk and Tips

Check ball retainer screw thread size

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mcx:
I picked up a basket case 73 Pontiac qjet with a leaded over plug on the stripped threads check ball retainer screw?...anyone know the stock thread size of the retainer screw?. I'm hoping to find a oversize insert to salvage this build. Thanks.

Cliff Ruggles:
Going from memory I think they are 1/4" fine threads but I'd have to go check one to make sure....

mcx:
Thanks...I believe it's 1/4-28.

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