Two Holes In 1965 Coupe Frame for Each Of Three Radio Ground Straps

[Tom D.]

Another member suggested I might ask: For U69 Radio Corvettes, is it common to see an extra un-threaded hole near the threaded hole used for "to the frame" grounding straps? I found this on the crossmember for the exhaust clamp ground straps (on both sides) as well as for the frame location for the power antenna ground strap; 1965 Corvette made in March.

ground strap holes - 1.jpgground strap holes - 2.jpg



p. s.
There's only one hole on each of the engine mounting "horns" up front.

[Dick C.]

Re: Two Holes In 1965 Coupe Frame for Each Of Three Radio Ground Straps

IMG_2205.jpgIMG_2202.jpg
Power antenna ground, top hole threaded
Late 65 - 20xxx

[Leif A.]

Re: Two Holes In 1965 Coupe Frame for Each Of Three Radio Ground Straps

Tom,
A picture of my '67 antenna ground strap at frame.

[Gary B.]

[Leif A.]

Re: Two Holes In 1965 Coupe Frame for Each Of Three Radio Ground Straps

Gary,
I guess that picture wasn't very clear (my bad). Here's a better picture...one hole only.

[Stephen L.]

Re: Two Holes In 1965 Coupe Frame for Each Of Three Radio Ground Straps

Maybe the drill bit was the wrong size and the bolts would not tighten. Second hole (used) may be slightly smaller..........

[Tom D.]

Re: Two Holes In 1965 Coupe Frame for Each Of Three Radio Ground Straps

Here's my idea: The drill operator pushed too hard (or too long) the first time, and stripped the threads in the "extra hole".
Then did it again and left a smaller hole. (I've asked Larry Galloway about this via his email.)