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Old 06-27-2014, 08:34 PM   #32
70gmcjimmy's Avatar
Join Date: Apr 2006
Location: Rapid City, SD
Posts: 837
Re: Name that bolt/nut/screw size

Originally Posted by Dale99 View Post
I looked up, it would be 5/16 threads on gravel guards.
Yeah that's the "normal" standard. 1/4" bolts have a 7/16" head and nut, 3/8" bolts have a 9/16" and a 7/16 bolt has a 5/8". There are possible variations like those 12 point hood latch bolts but these are normal I.D. for buying bolts.

Originally Posted by Dale99 View Post
Hatch handle screw is #8-1.25"
Instead of "tapered" those screws would be called "countersunk" I have an unmolested '70 Jimmy partially tore apart that may provide some info you are wanting on this thread.

The rear seat hold down bolts are a 7/16" fine thread, as well as the seat belt bolts front, rear and the threaded holes in the roof where a shoulder harness was possible.

Great thread!---DAC
1970 GMC K5 Jimmy Custom 4X4 Mom's driver from 1971 to 2001!! Under rebuild!
1972 GMC C2500 Pickup owned since 1979 Needs a rest and refurbish!
1955 GMC 100 2nd design driven almost daily!

Rest In Peace Mom. "Dolly" 7/15/23 - 5/18/09
GMC driver for 30 years!

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