New factory oem body bolts.
Direct replacement for GM Part# 3846202, 12337916, 15598757, and 15686047.
Sold as a set of (20).
These are the EXACT bolts that are used on the assembly line, not generic hardware.
Fastener Specifications:
Grade: 9.8
Thread: 5/16-18 (standard)
Length: 1"
Head: 1/2" Indented Hex Head with 7/8" Outside Diameter Loose Washer
Finish: Black Phosphate
These are also widely used on the front end, body panels, under the hood, chassis and the interior.
Black phosphate coated (not painted), so the finish will last.
These are largely used on GM cars up to 1977 and full size trucks up to 1987. Most, but not all cars converted to both metric and standard in 1978 and full metric in 1981. Most, but not all full size trucks converted to full metric in 1988.