'TR' Head Markings on Bolts

[Rich P.]

Re: 'TR' Head Markings on Bolts

Production line large TR's start in 69. I also have seen at least 4-5 different TR sizes. I also have several examples of the backwards TR which seams to be a solid axle era. Lastly I have many backwards L timing chain fover bolts!

Rich

[Rich P.]

Re: 'TR' Head Markings on Bolts

Production line large TR's start in 69. I also have seen at least 4-5 different TR sizes. I also have several examples of the backwards TR which seams to be a solid axle era. Lastly I have many backwards L timing chain fover bolts!

Rich

I need to clarify Large TR VALVE COVER BOLTS started in 69.

Rich

[Tom M.]

Re: 'TR' Head Markings on Bolts

I need to clarify Large TR VALVE COVER BOLTS started in 69.

Rich

thanks Rich.

[Mike B.]

Re: 'TR' Head Markings on Bolts

Doug and Rich,

A couple of years ago I bought this guy out of as many '60s period bolts he had that were in good to excellent shape. Really enjoyed picking through and separating them back home. What a shocker to find 2 excellent black phosphate backwards TR bolts among them. They both measure: 5/16-18 x 3/4" grade 2.

Same size as midyear headlight support rods etc...

Doug, is yours the same size?

Mike

[Ronald L.]

Re: 'TR' Head Markings on Bolts

Rich, thanks for jumping in here with what you have seen, it is nearly what I expected as there were more of these large TR's I found in the "fasteners box" for motors in this early C3 time frame. With the grease on them, I am sure they came off these motors.
Mike the head light support brace part is 122007, you can see many a post on that part number. You have the spec down correct, but head mark on four 1966 original cars througout the year was RSC.

[Doug F.]

Re: 'TR' Head Markings on Bolts

Doug and Rich,

A couple of years ago I bought this guy out of as many '60s period bolts he had that were in good to excellent shape. Really enjoyed picking through and separating them back home. What a shocker to find 2 excellent black phosphate backwards TR bolts among them. They both measure: 5/16-18 x 3/4" grade 2.

Same size as midyear headlight support rods etc...

Doug, is yours the same size?

Mike

Mike, same as you describe only mine is zinc

[Ronald L.]

Re: 'TR' Head Markings on Bolts

spec on the 122007 is zinc or cad but I expect for as poorly as they lasted the supplier was using zinc.