Half shaft cap bolts

[Keith L.]

In searching past threads i found this pic posted by Terry McManmon. It is of a low mile 72. What finish are the bolts supposed to be on a 70. Whathat are these in the pic. The washer appears darker.

[Terry M.]

Re: Half shaft cap bolts

Lovely car, isn't it?

Bolt is zinc (just a guess, and I haven't been guessing well tonight) and washer natural.

[Keith L.]

Re: Half shaft cap bolts

And I found this after I thought they were phosphate.

[Patrick H.]

Re: Half shaft cap bolts

And I found this after I thought they were phosphate.

Small block u-bolts are black phosphate.

[Terry M.]

Re: Half shaft cap bolts

Small block u-bolts are black phosphate.

That picture IS of a small block. 1972 ZR1 with 300 miles.

[Keith L.]

Re: Half shaft cap bolts

I found the old post and Now realize Joe lucia was talkiing about the spindle flange bolts being phosphate.

"GM says that the same bolts were used for the half shaft flange-to-spindle flange for the L1963 through 1979 period. These were GM #3843384. They are 7/16-20 X 1-1/8" long. They have 1/8" of un-threaded shank below the head and 1" of thread. They are of GM 300-M material grade (SAE grade 8) and have a phosphate-organic finish. These are the bolts seen in Wayne's photos. This is the only style bolt I have ever seen on any 63-79 that I've observed. The only differences I've observed relate to the headmarking in the center of the bolt head---the rest of the head configuration is the same.
"

So the caps bolts are cad.
I think I get it now.
Just because I'm cussing in the garage, don't mean I ain't having fun!

[Timothy B.]

Re: Half shaft cap bolts

What I can't get over is on early 63's these bolts are used without any lock washer or french locks.

Didn't these guys build tanks durning the war??

[Patrick H.]

Re: Half shaft cap bolts

That picture IS of a small block. 1972 ZR1 with 300 miles.

OK, small block "non option" motors.



You knew what I meant.

[Terry M.]