Does Zinc Phosphate Bolt Use a Zinc Phosphate Lock Washer

[Gary B.]

Re: Does Zinc Phosphate Bolt Use a Zinc Phosphate Lock Washer

All,

A google search of GM4435M turned up some interesting details. It's Code A that applies in this case. I believe GM4435M has been superseded, so probably no longer used by GM.

Gary

[Jack O.]

Re: Does Zinc Phosphate Bolt Use a Zinc Phosphate Lock Washer

Gary,

Thanks for the AMK Products lead. I wasn't familiar with them How did you cross the GM part numbers to an AMK item. I didn't see a way to do it on their web site. Do you have to call them? How about Dr. Rebuild?

--Jack

[Leif A.]

Re: Does Zinc Phosphate Bolt Use a Zinc Phosphate Lock Washer

Gary,

Thanks for the AMK Products lead. I wasn't familiar with them How did you cross the GM part numbers to an AMK item. I didn't see a way to do it on their web site. Do you have to call them? How about Dr. Rebuild?

--Jack

Jack,

Open the link below and on the left hand side is a box called "PDF catalog", click that button and at the very bottom of the list is the glossary for OEM part numbers.

https://www.amkproducts.com/Catalog_PDF.htm

[Gary B.]

Re: Does Zinc Phosphate Bolt Use a Zinc Phosphate Lock Washer

Gary,

Thanks for the AMK Products lead. I wasn't familiar with them How did you cross the GM part numbers to an AMK item. I didn't see a way to do it on their web site. Do you have to call them? How about Dr. Rebuild?

--Jack

Jack,

Just do a google search to see if AMK has a GM part, e.g., google AMK Products 9418931. That will get you to an AMK PDF or webpage with the part.

Regarding Dr. Rebuild, I think he only sells a 9418931 nut in silver zinc, which apparently is not the correct finish.

Gary

[David B.]

Re: Does Zinc Phosphate Bolt Use a Zinc Phosphate Lock Washer

With regards any nut, bolt, washer etc. used on any GM car if it has an assigned part number (as a rule they all do) the complete description in most cases can be readily described and yes there is a large volume of Engineering specs for all GM fasteners. To ask for the part # (per Gary) is by far the most important question. Based on some of the threads I have read I think there is a lot of misconceptions about nuts, bolts & washers etc.. GM has specific ground rules and specifications for all applications on their cars and trucks. With regards to zinc, cad phosphate etc. there are a multitude of different specifications for each. Knowing where they will be installed will determine the specification. For anyone looking for specs. on a particular fastener it is super important as Gary suggested do your research and provide a part number.