Is it wrong to believe that SEMS bolts were used as below on a Nov 63 car?
Looking under my dash at the steering column mounting, hood release mounting and parking brake mounting I found 5 SEMS 5/16-18 X 3/4 black phosphate indented head captured conical washer about 3/4 dia...same basically as a 3846202 used on the female hood catch. The sixth of six was E stamp 7/8 long with a serrated washer...a real 3847758 with no paint or rust. All six look too good to be 50+ years old and I "assumed" they had to have been replaced but the one serrated has to be 50+ or NOS; they are extremely hard to find/buy unless you get used. Then I looked at the screw holding the dash brace, item 2, AIM 1AsmB1.00, which is secured to the dash cross brace by item 6, a 3846202. It is rusted and has body color paint overspray as does the cross brace but no wrench mark...and IT IS SEMS. I'd bet a lot it has been there since the paint/assembly line. Hence, my lead question.
My lower hood hinge bolts, 3847758 with serrated washers have been replated bright (zinc or cad), which is wrong by all prior information, But my female hood latch and outer splash shield bolts (spec'd as 3846202) are SEMS and are also bright and may have been plated wrong at the same time. So, same question: is SEMS wrong or is it just the plating that is wrong. Could the parts bins have had SEMS in them as a trial ordered by the hardware buyer for the 3846202 on a day in late Nov 63.
I'd appreciate any philosophy or, better yet, experience in this area.
Looking under my dash at the steering column mounting, hood release mounting and parking brake mounting I found 5 SEMS 5/16-18 X 3/4 black phosphate indented head captured conical washer about 3/4 dia...same basically as a 3846202 used on the female hood catch. The sixth of six was E stamp 7/8 long with a serrated washer...a real 3847758 with no paint or rust. All six look too good to be 50+ years old and I "assumed" they had to have been replaced but the one serrated has to be 50+ or NOS; they are extremely hard to find/buy unless you get used. Then I looked at the screw holding the dash brace, item 2, AIM 1AsmB1.00, which is secured to the dash cross brace by item 6, a 3846202. It is rusted and has body color paint overspray as does the cross brace but no wrench mark...and IT IS SEMS. I'd bet a lot it has been there since the paint/assembly line. Hence, my lead question.
My lower hood hinge bolts, 3847758 with serrated washers have been replated bright (zinc or cad), which is wrong by all prior information, But my female hood latch and outer splash shield bolts (spec'd as 3846202) are SEMS and are also bright and may have been plated wrong at the same time. So, same question: is SEMS wrong or is it just the plating that is wrong. Could the parts bins have had SEMS in them as a trial ordered by the hardware buyer for the 3846202 on a day in late Nov 63.
I'd appreciate any philosophy or, better yet, experience in this area.
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