Topic: Help Identify Bolts

[ChrisV289]

I have these three bolts that I came across.  I'm not sure if they belong to my car or not (SJ Oct 64 build).  All three are 9/16 head size.  Not sure of the one on the end is the coil bracket bolt or not.  Any ideas?

[Bob Gaines]

I have these three bolts that I came across.  I'm not sure if they belong to my car or not (SJ Oct 64 build).  All three are 9/16 head size.  Not sure of the one on the end is the coil bracket bolt or not.  Any ideas?

Bottom two are too long for coil bolt and serrated lock washer typically not for coil application ether.

[CharlesTurner]

Does your car have a/c?  The bottom 2 look like compressor mounting bolts.

[ChrisV289]

It does have AC.  Would they be the two that hold it on the side of the dog ear or 2 of the 4 on the bottom of the bracket?  The AMK bolts I ordered look nothing like these..

[CharlesTurner]

The side bolts would be a bit longer, but typically have the tooth washer also.  These look like 2 of the 4 bolts that mount the compressor to the iron bracket.

[jwc66k]

A size - diameter, threads per inch and length would be useful. A picture is worth a thousand words, except for perspective.
Jim

[ChrisV289]

Does this help?

[jwc66k]

Are they 7/16 or 1/2 dia? The size hex wrench to tighten would be a help.
JIm

[Bob Gaines]

Are they 7/16 or 1/2 dia? The size hex wrench to tighten would be a help.
JIm

I believe he indicated in his first post that they were 9/16 hex head.

[lancelot66]

I'm going through this with our car right now, coincidently enough. Your top bolt with the 'R' in the head marking is your coil bracket to intake bolt. The other two bolts with the serrated, external tooth washers are as Charles states - two of the four bolts that mount the compressor to the bracket from underneath. He's right about the dog leg bracket bolts that screw into the compressor from the left side too (front of your car looking at it). Those would be the same head marking (as your bottom two in your photo) but with a flange head, external tooth washer, as the others, only longer. Found them to be the same thread size and length as the two starter bolts, just different washers and head markings, but consistent with that flange head configuration.
Hope this helps.

[lancelot66]

Also, if you have Bob Mannel's book or access to it as a reference, on page: 6-48 6K25, photo plate 'C', the bolt on the left is the dog leg bracket bolt that I have in ours (integrated serrated washer type). The bolt on the right, same photo, is what came along and replaced it, later in the model year(s).

[lancelot66]

Checked in the garage after I wrote this morning and left for work, dog leg bracket bolts are 'not' the same length as the starter bolts (V8). Starter bolts are slightly shorter. Same thread but also have 1/2" head, rather than the 9/16" discussed here already (and verified as well). I need to wake up a little more before writing me thinks...

[jwc66k]

Your top bolt with the 'R' in the head marking is your coil bracket to intake bolt.

Quite possible. That bolt, p/n 43265-S8 (3/8-16X3/4 HH, splt lkw) was used for the coil bracket to the manifold for 64 and 66.

The other two bolts with the serrated, external tooth washers are as Charles states - two of the four bolts that mount the compressor to the bracket from underneath.

True. These are 42774-S8 (3/8-16X7/8 HH, ext lkw) were used to mount the compressor.

I believe he indicated in his first post that they were 9/16 hex head.

Thanks Bob.

I have these three bolts that I came across.  I'm not sure if they belong to my car or not (SJ Oct 64 build).  All three are 9/16 head size.  Not sure of the one on the end is the coil bracket bolt or not.  Any ideas?

If you had provided actual dimensions - diameter, thread pitch, length, the information would have been easier to retrieve and post.
Jim

[ChrisV289]

Thanks for the information. 

[Bob Gaines]

Quite possible. That bolt, p/n 43265-S8 (3/8-16X3/4 HH, splt lkw) was used for the coil bracket to the manifold for 64 and 66.True. These are 42774-S8 (3/8-16X7/8 HH, ext lkw) were used to mount the compressor.Thanks Bob.If you had provided actual dimensions - diameter, thread pitch, length, the information would have been easier to retrieve and post.
Jim

I for one am always impressed in the time you take to look up the hardware and grateful for you doing so.