help with GM part numbers
Thank you
I often find what I'm looking for in this. Not everything is here, and not all the descriptions are great, but it helps enough to be worthwhile having.
It's available from some of the larger vendors and probably on the bay too.
Are you thinking about 'parts' or 'fasteners'?
Regards,
Alan
Last edited by Alan 71; Mar 19, 2016 at 03:23 PM.
Good Luck
Wes
I often find what I'm looking for in this. Not everything is here, and not all the descriptions are great, but it helps enough to be worthwhile having.
It's available from some of the larger vendors and probably on the bay too.
Are you thinking about 'parts' or 'fasteners'?
Regards,
Alan

The problem with the Corvette Parts Books, is that the parts books don't have a numerical listing of part numbers. To find a part number, you either need to know the GM Group number the part is in, or know what the part is, so you can look it up by description.
Dealers didn't need a list of part numbers, because a mechanic or customer, coming to a parts department, isn't going to know or have a part number. All they're going to know, is what the part is.
There was a GM book that had a numerical list of part numbers, called the Parts History book. With a Parts History book, you can look up a part number, and it will tell what group number the part number is in. With the group number, you can go to that group in the Parts Book, and find the part number in the group. The Parts History also listed discontinued and superseded numbers.
The problem with the Parts History books is that the info in them changed constantly, and they can be hard to find today. The Parts History's were updated either monthly or quarterly, so dealers didn't keep them around long, and they usually only contained current or recently changed or discontinued numbers.
The problem with the Corvette Parts Books, is that the parts books don't have a numerical listing of part numbers. To find a part number, you either need to know the GM Group number the part is in, or know what the part is, so you can look it up by description.
Dealers didn't need a list of part numbers, because a mechanic or customer, coming to a parts department, isn't going to know or have a part number. All they're going to know, is what the part is.
There was a GM book that had a numerical list of part numbers, called the Parts History book. With a Parts History book, you can look up a part number, and it will tell what group number the part number is in. With the group number, you can go to that group in the Parts Book, and find the part number in the group. The Parts History also listed discontinued and superseded numbers.
The problem with the Parts History books is that the info in them changed constantly, and they can be hard to find today. The Parts History's were updated either monthly or quarterly, so dealers didn't keep them around long, and they usually only contained current or recently changed or discontinued numbers.
For chassis fasteners the book Corvette Chassis Restoration Guide 53-72 by Josheph Tripoli jr. can be quite a help The fasteners listed for 68-72 cars are usable for later years too.
He lists bolts by place used rather than part number.
He uses simple diagrams and lists to describe the type, size, and head of many bolts.
The book is just for chassis and suspension fasteners.
Regards,
Alan
Here's a typical page of one of his lists.
The Best of Corvette for Corvette Enthusiasts
Like the Corvette Parts Catalog, the Standard Parts Catalog isn't much help if the only thing you have is a part number. Hardware in the Group 8.900 is listed by the type of hardware it is, with the part number listed after the size.
If you know you're looking for a 5/16"-18 x 1" indented hex head, self tapping screw, with a captive washer, you can go to that section and find the part number. If all you have is the part number, you'd need to go through page after page of hardware, until you (maybe) find the part number you're looking for.
Joe Tripoli's book that Alan referred to, is a very good source of information, even when you consider that Joe wrote the book close to 30 years ago. Most of the common engine and chassis bolts are listed in it, but I don't believe any interior hardware/screws are included.
Paragon Corvette use to give a way a great poster, that was a chart of bolts, head marks, sizes and their applications. I don't know if they still offer them, but it would be worth a call to find out.
As I'm sure you've gathered by now there's simply no single source for small part and fastener information.
Personally I use all the sources that have been listed so far.
For SOME people there're 2 more issues to be considered when looking for fasteners… what was the 'finish' (natural, cadmium, zinc, black oxide, phosphate?) on the original fastener for that application, and then even more scary, what was the 'typical' manufacturer's (there were more than 200 suppliers) head mark for that fastener during the period THIS car was built.
The NCRS Judging Guides has some information of that type as does the Paragon Corvette Reproductions catalogue and wall poster.
Regards,
Alan
Thanks again!





That is a god sent for the ambitious corvette guys who buys a project car and gets the accompanying 6 work buckets full of nuts and bolts etc....

Marshal
For chassis fasteners the book Corvette Chassis Restoration Guide 53-72 by Josheph Tripoli jr. can be quite a help The fasteners listed for 68-72 cars are usable for later years too.
He lists bolts by place used rather than part number.
He uses simple diagrams and lists to describe the type, size, and head of many bolts.
The book is just for chassis and suspension fasteners.
Regards,
Alan
Here's a typical page of one of his lists.

You're right, the person working on a car that has a bucket full of bolts needs all the help he can get.
Although I fully understand that getting the right bolts in the right place isn't important to everyone, there is a certain pleasure in making it happen.
Regards,
Alan
Assembling is quite a bit of fun when everything is ready to go back together.



















