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Bolt identification

  • DONALD.ELMER
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30 Oct 2020 04:03 #41336 by DONALD.ELMER
Bolt identification was created by DONALD.ELMER
Some time ago Curt Schulze told me that the "W" on bolts indicated made in Williamsport. Since then I have been alert to the symbols and so forth on other bolts that were on my 1933 8-105 Salon. There seem to be quite a variety-- can anyone list the various symbols and letters?

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30 Oct 2020 17:03 #41343 by johnmereness
Replied by johnmereness on topic Bolt identification
Mostly "W", "N", "O", and "OO", but I am sure there are others - basically all but about 10 bolts are marked on an 850, 851, or 852.

JMM

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  • DONALD.ELMER
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30 Oct 2020 19:55 #41347 by DONALD.ELMER
Replied by DONALD.ELMER on topic Bolt identification
so what do N, O and OO mean?

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31 Oct 2020 14:11 #41359 by JIM.OBRIEN
Replied by JIM.OBRIEN on topic Bolt identification
The bolt markings were manufacturer markings. Back in the 1930's there were no standardized markings for bolts as we have now. So each manufacturer had there own system for the bolts they produced. As such it is almost impossible to determine what the markings mean without knowing the manufacturer of the bolts and researching their history.

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31 Oct 2020 19:23 #41364 by johnmereness
Replied by johnmereness on topic Bolt identification
Basically, W, N, O and OO mean that you went the extra mile in restoration (in an Auburn Boattail or a Supercharged Sportsman is also means some extra dollars on the sale.

That said, my rule of thumb is W's on engine and N's on frame and fenders, but sometimes it does not work like that (a mixed bag as they may say).

JMM

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03 Mar 2021 07:26 #42476 by DONALD.ELMER
Replied by DONALD.ELMER on topic Bolt identification
So what does an N mean on a bolt?

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