Re: GM 9418970 Screw Assemblies; Non-Identical Twins
Timothy,
A lot of those door hardware screws changed to 3845714 and then by ‘65 to 9420849. The AIMs show that screw to have what appears to be an external tooth washer, but all of those screws on my ‘66 have flat washers. So, I think 9420849 has flat washers, but the AIM sketch of those screws was never changed after ‘63, even though the part number and the washer type changed.
It seems to me that if the original screws for the lower window run in the door jam had external tooth washers, it would be even more likely that the fiberglass, which the washer directly touches, would get destroyed over time. A flat washer makes much more sense at that location.
Gary
Timothy,
A lot of those door hardware screws changed to 3845714 and then by ‘65 to 9420849. The AIMs show that screw to have what appears to be an external tooth washer, but all of those screws on my ‘66 have flat washers. So, I think 9420849 has flat washers, but the AIM sketch of those screws was never changed after ‘63, even though the part number and the washer type changed.
It seems to me that if the original screws for the lower window run in the door jam had external tooth washers, it would be even more likely that the fiberglass, which the washer directly touches, would get destroyed over time. A flat washer makes much more sense at that location.
Gary
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