Steel Hex Bolt， Grade 8， Zinc Yellow-Chromate Plated Finish， Hex Head， External Hex Drive， Meets ASME B18.2.1/SAE J429， 7/8" Length， Fully Threaded， 5/16"-18 Threads (Pack of 50)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Grade 8 steel is often used in applications where strength is the primary concern</li><li>Zinc yellow-chromate plating offers good corrosion resistance</li><li>External hex drive tightens from the side with a wrench， enabling use when there is no space above for a driver</li><li>Meets ASME B18.2.1 and SAE J429 specifications</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51T7Lu%2BNoTL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41QevKmbxhL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31hKgQnDagL.jpg" noproxy>