This bolt (pictures below) was in one of my "Seat Track to Floor bolts" bags (should be UPC 1Seats-J5, Item 9, GM 3847757). There should be eight bolts total (four per seat). Seven of them measure 5/16-18 x 7/8" long, six are "E" headmark Gr5 bolts, plus this Gr5 bolt (same dimensions) headmarked "C". All are indented hex bolts with att/flat washer (sems), pointed tip.
The eighth bolt (not shown) is different and appears to be incorrect, indented hex Gr2 with "E" headmark, flat tip, measuring 5/16-18 x 3/4" long, flat washer is not attached.
Is this 5/16-18 x 7/8" bolt (below) with "C" headmark and three lines (Grade 5) a correct headmark seat-track-to-floor bolt for 1967?
The eighth bolt (not shown) is different and appears to be incorrect, indented hex Gr2 with "E" headmark, flat tip, measuring 5/16-18 x 3/4" long, flat washer is not attached.
Is this 5/16-18 x 7/8" bolt (below) with "C" headmark and three lines (Grade 5) a correct headmark seat-track-to-floor bolt for 1967?
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