Mr Gasket 915 Header Bolts

Size of the header bolt thread is 3/8-16 and length of the head is 3/4 Header bolt is special washer faced Fastener is made of steel with black oxide finish Smaller-than-standard hex head is ideal for tight spaces Grade 5 with a 7/16 hex head Mr. Gasket Hex Head Header Bolt has a washer faced, smaller-than-standard hex head ideal for tight spaces. It is designed for quick, easy installation of headers. Header bolt is heat-treated for extra strength. This header bolt comes with Grade 5 hex head that has 3 slash marks on the top. Protective black finish resists corrosion.