New factory GM replacement 30-piece BULK engine bay and body bolt kit. This kit will save you over 50% over purchasing our individual bolt kits.
Save up to an additional 20% with Bulk Pricing
These are the EXACT bolts that GM used all over your car/truck, not generic hardware store bolts.
Fastener Specifications (from top to bottom in photo):
GM Part# 3986997
Quantity: 10
Grade: 9.8
Thread: 3/8" - 16 (standard)
Length: 1"
Head: 9/16" Indented Hex Head with 1" Outside Diameter Loose Washer
Finish: Black Phosphate
GM Part# 3846202
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
GM Part# 3960314
Grade: 9.8
Thread: 5/16" - 18 (standard)
Length: 13/16"
Head: 1/2" Indented Hex with 21/32" Outside Diameter Fixed Washer
Finish: Black Phosphate
These are the top 30 main bolts that are largely used throughout the car. The most common place these are used is on the front end, starting with the hood hinges to the body, fenders and bumper brackets. Depending on your vehicle, they are also widely used on other body panels, under the hood, chassis and the interior.
They have a black phosphate coating (not painted), so the finish will last.