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Attached is a picture of the screws on my Metuchen built car. The upper screw is a Philips pan head screw zinc plated. The hole on the upper screw is worn from removal but the drivers side is clearly not countersunk. The lower countersunk screw is per the assembly drawing. Alan
The S9 zinc finish is what I have observed, but my enquiry was regarding the S2 finish on dark interiors. Has anyone observed this from any plant on unrestored examples?
Looking at the pictures I have of 70's from all plants and across the year while trying to focus more on the black interior cars, did not find any examples that support a P 7 O finish used on the 70 interior trim panel retaining screws on Mustangs
Let me be the devils' advocate. If a 70 Mustang Sportsroof, or Mach I, with a dark interior, showed up at a MCA judged car show, with the referenced screws having a phosphate and oil treatment, as noted in the 1970 Mustang Interior Assembly Manual, what would you do? Do you have documentation to the contrary? How about the Thoroughbred class? Jim
The question still remains. Where is the documentation authorizing the substitution of -S9 screws for -S2 screws?Jim
The 11/14/69 revision of the assembly manual dwg # TO-525 (attached again) is the only reference I have found to S2 finish screws being used on dark interiors, supported of course by the availability of said same reproduction fastener kit from AMK. However from the photographic evidence Jeff has kindly provided it seems that originals were exclusively S9 - with no S2 production fasteners documented so far.