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bolt/screw help

Old Jun 8, 2009 | 03:35 PM
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Default bolt/screw help

Hello all
I am finishing up a restoration of a '71 coupe and need help with some specs on two different screws:
1) The bolt for the lower spark wire bracket ('71 AIM UPC6 B6 page 191 part number 12, GM#274430). I lost these, but since these are the only bolts I lost during the restoration I still feel pretty good about myself

2) The screws for headlamp plastic brackets, the ones that hold the plastic brackets which the headlamp adjustment screws are mounted in ('71 AIM UPC12 A4 page 249 part number 6, GM#9420146). Two were broken so i need replacements.

I tried the "1953-1982 Corvette Parts Manual" but wasn't able to find them.

Any info on thread size, fine/coarse and length would be appreciated.
Thanks in advance from Denmark
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Old Jun 8, 2009 | 05:06 PM
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Hi K,
The bolt for the spark plug wire clip is a hex head, 1/4"-20 x 1/2".
The head light screw is odder. It's a filister head, phillips type, machine screw, but I can't find the size. PARAGON has them, maybe you can convince them to put a couple of them in an envelope and mail them to you.
Good Luck in Denmark!!!
Regards,
Alan
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Old Jun 8, 2009 | 06:16 PM
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Originally Posted by Alan 71
Hi K,
The bolt for the spark plug wire clip is a hex head, 1/4"-20 x 1/2".
The head light screw is odder. It's a filister head, phillips type, machine screw, but I can't find the size. PARAGON has them, maybe you can convince them to put a couple of them in an envelope and mail them to you.
Good Luck in Denmark!!!
Regards,
Alan
Hi Allan
Thanks for the help
The 1/4"-20 x 1/2" bolt is that UNC or UNF?

Karsten
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Old Jun 8, 2009 | 06:19 PM
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A 1/4 20 is a UNC
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Old Jun 8, 2009 | 06:26 PM
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Originally Posted by Gordonm
A 1/4 20 is a UNC
Thank you
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