Can someone identify these spare tire bolts (lock) as to year and Application

[Joe R.]

Thanks guys for looking and trying to identify these spare tire bolts as to year and application.

JR

[Harry S.]

Re: Can someone identify these spare tire bolts (lock) as to year and Application

I'll take a shot at two of them.

Far right - Early 63

2nd from the right - later 63

[Joe L.]

Re: Can someone identify these spare tire bolts (lock) as to year and Application

JR------

The second one from the left is either a GM #3841464 (64-67) or a GM #3933819 (68-74 and 63-67 SERVICE).

I'm guessing the one on the left is probably a GM #345476 used for 1975-77 Corvettes.

[Kenneth F.]

Re: Can someone identify these spare tire bolts (lock) as to year and Application

<sup>I have had a '66, since '67 that has the original spare tire. The bolt is 7" overall. The threads are 2 1/2" long. The head markings are like the far left and far right. The silver plating goes from the wrench flats only to, but not including the top bevel, a total of 7/8." The assembly looks like the far left example, except for the amount of plating.

Ken</sup>

[Joe R.]

Re: Can someone identify these spare tire bolts (lock) as to year and Application

Thanks for the replies.

This is what I know about these bolts. First the first two on the left were plated by mistake. They were never plated from the factory. The rusty one on the right has the part number on the tag taped to the bolt. It is NOS. The 7.632 is part number 3933819 and listed in the 77 parts catalog as Bolt-Wheel Carrier 63-74. This is an original replacement from GM.
The rest I have no idea. But none are original 63's!

Thanks again,

JR

[Joe L.]

Re: Can someone identify these spare tire bolts (lock) as to year and Application

Thanks for the replies.

This is what I know about these bolts. First the first two on the left were plated by mistake. They were never plated from the factory. The rusty one on the right has the part number on the tag taped to the bolt. It is NOS. The 7.632 is part number 3933819 and listed in the 77 parts catalog as Bolt-Wheel Carrier 63-74. This is an original replacement from GM.
The rest I have no idea. But none are original 63's!

Thanks again,

JR

JR------

Not knowing the overall length of the bolts puts one at some disadvantage as far as identifying them.

First of all, let me say that I have little familiarity with the 1963 bolts. However, I do know that there were at least 3 different bolts used for 1963. The first was GM #3794107. This bolt had no stop above the threaded section of the bolt. This bolt was 6-29/32" to 7" in overall length. The threaded section was 3" in length. The GM specifications for this bolt specify that it is to be plated cadmium or zinc. The second bolt was GM #3833385. This bolt was identical to the above except there was a welded-on nut to serve as a stop at the upper end of the threaded section. The third bolt was GM #3841464. This bolt was 7" in overall length with a thread length of 2-1/2". It had a formed-in, "triangular" stop at the base of the non-threaded section. This bolt was used from later 1963 through 1967. I have no definitive information on the finish of this bolt but I would be amazed if it was bare steel.

Early 1968 used bolt GM #3914223. I have no information on this bolt.

Later 1968 through 1974 Corvettes used bolt GM #3933819. This bolt also became SERVICE for 1963-67 when the 3841464 was discontinued in January, 1971. This bolt is 7-5/8" overall length with a threaded section of 3". It has the "triangular" stop like the 3841464. The original 3933819 installed on my 1969 was zinc plated. I have 2 NOS GM #3933819 and both are zinc plated. I have no idea why the one you show was apparently not zinc plated. I believe this to be highly atypical.

1975-77 Corvettes used bolt GM #345476. 1978-82 Corvettes used bolt GM #471903. I have NOS examples of both of these bolts but I don't feel like digging them out right now. From recollection, though, I can tell you that they are both longer in overall length than the 3933819 and both are zinc plated. Otherwise, their general configuration is the same as the 3933819.

It is possible that some of the bolts you picture were not even Corvette bolts but, perhaps, were used on trucks or some other application.

Addendum:

There was one other lock bolt used from 1965-67. This was used for applications with optional goldline and/or redline tires and was GM #3872959. This bolt was 5" from the top to the bottom of the "triangular" stop and 2-1/2" to 3" of thread length. Per GM specs, it was zinc plated.

[Joe R.]

Re: Can someone identify these spare tire bolts (lock) as to year and Application

Joe,

I have never seen a mid year (63-67) REAR bolt that was plated. All these were never plated until I sent the first two to the plater by mistake. My never having seen any doesn't mean some were not plated as some people (mine is original cause I am the second owner) have plated REAR spare bolts.
This little exercise is for the rear adjustable bolt only.
It seems you are describing the 63 FRONT spare tire bolts as they varied like the bolts you describe and were all plated.
As the years got higher the bolts got longer as the spare tire was larger after 68 AND there was probably different bolts for KO wheels and later tires for the C-2.
Just probing to see if anyone has definitive knowledge.
Also, I have never seen a C-2 FRONT hanger bolt that was not plated.

Thanks,

JR

[Joe L.]

Re: Can someone identify these spare tire bolts (lock) as to year and Application

Joe,

I have never seen a mid year (63-67) REAR bolt that was plated. All these were never plated until I sent the first two to the plater by mistake. My never having seen any doesn't mean some were not plated as some people (mine is original cause I am the second owner) have plated REAR spare bolts.
This little exercise is for the rear adjustable bolt only.
It seems you are describing the 63 FRONT spare tire bolts as they varied like the bolts you describe and were all plated.
As the years got higher the bolts got longer as the spare tire was larger after 68 AND there was probably different bolts for KO wheels and later tires for the C-2.
Just probing to see if anyone has definitive knowledge.
Also, I have never seen a C-2 FRONT hanger bolt that was not plated.

Thanks,

JR

JR-------


I'm not referring to the front bolts; I'm referring to the rear, lock bolt. All of the part numbers I've provided are for the rear, lock bolt.

Note the picture that Harry provides above of a 1963 bolt. This looks like the early GM #3794107 bolt. Note that it is PLATED (as GM says it should be).

So, you are saying that all the 63-67 rear lock bolts you've seen were rusty looking things? Because, if they were not plated that's exactly how they would appear now.

By the way, there are several NOS GM #3933819 bolts for sale on eBay right now. ALL are PLATED, just like the ones I have.

[Joe R.]

Re: Can someone identify these spare tire bolts (lock) as to year and Application

JR-------


I'm not referring to the front bolts; I'm referring to the rear, lock bolt. All of the part numbers I've provided are for the rear, lock bolt.

Note the picture that Harry provides above of a 1963 bolt. This looks like the early GM #3794107 bolt. Note that it is PLATED (as GM says it should be).

So, you are saying that all the 63-67 rear lock bolts you've seen were rusty looking things? Because, if they were not plated that's exactly how they would appear now.

By the way, there are several NOS GM #3933819 bolts for sale on eBay right now. ALL are PLATED, just like the ones I have.

Joe,

No reply! Wasted enough time with this thread!

JR

[Joe L.]

Re: Can someone identify these spare tire bolts (lock) as to year and Application

Joe,

No reply! Wasted enough time with this thread!

JR

JR------


I'll bet I spent a lot more time on this thread than you did. However, I don't consider it wasted time, at all. I consider it time well spent on research for an issue that might be of interest or help to others.

[Gary B.]

Re: Can someone identify these spare tire bolts (lock) as to year and Application

JR------


I'll bet I spent a lot more time on this thread than you did. However, I don't consider it wasted time, at all. I consider it time well spent on research for an issue that might be of interest or help to others.

Joe,

I agree with you 100%.

Gary