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Bolt identification
- Curt Schulze
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12 Mar 2021 15:42 #42609
by Curt Schulze
The bitterness of poor quality remains long after the sweetness of low price is forgotten.
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Curt
Replied by Curt Schulze on topic Bolt identification
John, I would like to see metallurgy tests on 'W' , 'N' , '30' and Plain head high hex bolts. The only place that I know the factory was consistent was the head bolts .
The bitterness of poor quality remains long after the sweetness of low price is forgotten.
Be of Good Cheer
Curt
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- johnmereness
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11 Mar 2021 23:45 #42598
by johnmereness
JMM
Replied by johnmereness on topic Bolt identification
I would agree to disagree with Curt on that - Curt is very correct in that it is not that they used grade 3, 5, and 8 like today - it was that they had certain diameters of bolt and certain thickness of head to allow for the equivalent. Thus, an N bolt that you see more often on a frame is different from say a 30 bolt - even though there is not formal grade 3, 5, 8, or ... designation.
JMM
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06 Mar 2021 14:31 #42526
by Curt Schulze
The bitterness of poor quality remains long after the sweetness of low price is forgotten.
Be of Good Cheer
Curt
Replied by Curt Schulze on topic Bolt identification
No, torque wasn't used for automotive applications until WWII
The bitterness of poor quality remains long after the sweetness of low price is forgotten.
Be of Good Cheer
Curt
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- DONALD.ELMER
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06 Mar 2021 03:40 #42522
by DONALD.ELMER
Replied by DONALD.ELMER on topic Bolt identification
Interesting... are there specific bolts when torque is required?
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05 Mar 2021 18:02 #42511
by johnmereness
JMM
Replied by johnmereness on topic Bolt identification
Yes, lots of 30 bolts.
I usually find N's on the frame and attachment for the fenders. I really have no rule of thumb though other than I find N's where there does not need to be a torque.
I usually find N's on the frame and attachment for the fenders. I really have no rule of thumb though other than I find N's where there does not need to be a torque.
JMM
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03 Mar 2021 14:01 #42477
by Curt Schulze
The bitterness of poor quality remains long after the sweetness of low price is forgotten.
Be of Good Cheer
Curt
Replied by Curt Schulze on topic Bolt identification
Do not forget "30" . They are very prevalent on 34-36 Auburns. Plain heads
(no marks) were also used. The old bolts have a 'high hex' the newer style , came after WWII. This is also true for steel and brass fittings.
(no marks) were also used. The old bolts have a 'high hex' the newer style , came after WWII. This is also true for steel and brass fittings.
The bitterness of poor quality remains long after the sweetness of low price is forgotten.
Be of Good Cheer
Curt
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- DONALD.ELMER
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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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31 Oct 2020 19:23 #41364
by johnmereness
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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).
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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- JIM.OBRIEN
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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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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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30 Oct 2020 17:03 #41343
by johnmereness
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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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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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