Mr. Gasket Headlock Locking Header Bolts - 3/8-16 x 3/4 Inch - Set of 16 - 2231G radiators-and-accessories 6L/L4 1999 - 2000 Acura

6L/L4 1999 - 2000 Acura EL 1

8 L L6 1966 - 1967 Jeep J-2600 327/5

2 V8 1970 - 1977 Ford F-250   300/4

8 V8 2003 - 2016 GMC Yukon SLE 325/5

Mr. Gasket Headlock Locking Header Bolts - 3/8-16 x 3/4 Inch - Set of 16 - 2231G radiators-and-accessories 6L/L4 1999 - 2000 AcuraOverview: Headlock Bolts eliminate the need for lock washers, Period. That's because each Headlock Bolt features 24 equally spaced, stainless steel teeth serrations that bite into and hold onto the attaching surface eliminating the need for lock washers. Features: 16 per Package Includes a ball head hex key socket installation tool that makes it easy to get them started 410 stainless steel Minimum 180,000 PSI tensile strength 24 equally spaced