Mr. Gasket 915 Hex Head Header Bolt<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Features a washer faced smaller than standard hex head that's perfect for getting into tight spaces</li><li>Designed to withstand the abuse of red hot exhaust ports and prevent leaks created by under tightened header bolts</li><li>Manufactured from heat treated Grade 5 steel with a corrosion resistant black oxide finish</li><li>Three eighths coarse threads .750 inch long</li><li>Set of 12</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41lPLa-arPL.jpg" noproxy>