Steel Self-Drilling Screw， Zinc Plated Finish， Hex Washer Head， External Hex Drive， Sealing， Includes Washer， 3/4" Length， #8-18 Threads (Pack of 100)<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Create their own threads when driven into material</li><li>Zinc Plated Steel fasteners are suitable where strength and corrosion resistance are primary considerations</li><li>Hex head for easy driving</li><li>Length is measured from under the head</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41i1%2B6qKkZL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41pqqpSCPKL.jpg" noproxy>