Header Fasteners, Bolts, Allen Head, Black Oxide, Steel, 8mm x 1.25 Thread, 25mm Length, Set of 16 Installing headers can sometimes be a real pain, due to the tight spaces and the location and shape of the tubes. Mr. Gasket can help make installation a little easier and also help prevent annoying exhaust leaks from under-tightened header bolts. Hex types are heat-treated Grade 5 steel and have smaller-than-standard heads to ease access in tight spaces. They also have a protective black oxide finish. Fastener Style: Bolt Thread Size: 8mm x 1.25 Head Style: Internal Allen Underhead Length (in): 0.984 in. Underhead Length (mm): 25mm Fastener Material: Steel Fastener Finish: Black oxide Quantity: Sold as a set of 16. Notes: 6mm hex key. 176,000 psi tensile strength.
