Correct Fasteners and headmarkings

[Mike S]

Outstanding chart, Marty! Thanks for taking the time to plot this and share.
I might add that there is also a bolt used to secure the front fender to inner wheel tub that has only the letter 'E' and no grade markings plus a squared inner wall shape (compared to round outer and squared inner).
I can send it shot of it if you want.

Mike

[IZRSSS]

Mike - if it isn't too much trouble please do, that way we can use yours as a reference...

Thanks!

[Mike S]

 Here ya go. This is from my 67 5B NOR. The majority are "-C-" but this was the different marking.

Mike

[IZRSSS]

There's that cool hex flange again. Thanks Mike I'll add it to the list.

[IZRSSS]

That L5 head marking is a RB&W product, not sure what the D one is.

Thanks for the info on the L5. Do you know what brought about the change? Just curious...

[Petes L48]

No idea, they also used an L8 and I believe L9, plus some other non "RB&W" head markings.  Some of the other fastener manufacturers also used several logos, maybe different divisions or plants. 

[IZRSSS]

15 more...

[IZRSSS]

Each time a sheet of 15 is filled I will stack each one so we don't have to back track...

[IZRSSS]

If you have a C60 car check the plenum valve's fasteners. For some reason I have 8mm's??? Can anyone verify???

Also, the fastener w/a 2 and 2 flying SS under it looks strange. Anyone have this or know what company made/makes it?

[68camaroz28]

Not a great picture but the speed nuts on the cowl blower motor box are all stamped with a 'C'

[IZRSSS]

Let me know if any of these fasteners are not original to these cars...

Thanks again Chick!

15 more...

[IZRSSS]

...the two previous sheets...

[Petes L48]

Some guesswork/SWAG-ing on head marking pics above:

D - possibly G.B. Dupont of Troy MI (with three radiating grade 5 hardness markings), entered into a L.P. with Kamax of Germany around 1974 and not sure if the D mark was dropped or retained afterwards

O - with six radiating grade 8 hardness marks?, possibly Alcoa Global Fasteners of La Puenta CA or more likely Ring Screw of Troy, MI

TR - Towne Robinson of Dearborn, MI.  Went out of business early 1990s.  I think AMK still supplies TR, maybe being reproduced today?

C w/ H inside - Cold Heading Co., Warren, MI

S inside circle - possibly Specials, Inc. of Westfield, MA, which would not fit the OH/MI/CA pattern of fastener suppliers

P - possibly Prestige Stamping, Warren MI

ER in circle - no idea

2 w/ SS below - no idea

C - no idea

= = - no idea, I don't think there would not be any metric fasteners on a 60s GM vehicle, US built

M underlined - Ingersoll/INFASCO of Ontario uses this, but I think always with a triangle. Unlikely.

rectangle - no idea

A - no idea

L inside G - no idea, maybe Great Lakes as I see they are an AMK supplier?

L and F - no idea



  

[IZRSSS]

Thanks Russ! Knowing who these companies are is a big part of the battle won. The other half is determining which of these companies actually supplied fasteners to GM during the First Gen run... and which ones are correct for each individual year. From what I've gathered so far, many of the same fasteners have been observed on both 67's & 68's. As for the 69, it too has many fasteners used during the first two years but a few appear to be unique to only the 69.

Here are the head marks John mentioned. Those highlighted in red are the ones we've managed to find so far (he also mentioned there are others, many, many more...); TR, UR, RBW, RSC, E, EL, F, AD, D, WB, L, LS, LE, C, M, ANCHOR.

If anyone is positive any of these are or are not factory First Gen fasteners (pictorials) please let us know so we can either keep them or cross them off.
Here are all the pages with numbers for each head-mark...numbering each one should help for future reference (sorry Russ I should have done this from the get-go).

[IZRSSS]

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