The Hillman Group 831530 1/4-20 x 3-1/2-Inch Stainless Steel Hex Cap Screw， 50-Pack<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>A common feature on a hex cap screw is a washer surface directly under the head which creates a better seal</li><li>An alternative for using them without nuts is to install them directly into a compatible internally threaded hole</li><li>Stainless Steel</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31LrRNo0ewL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/211mUHz7osL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/21JeXxeI6%2BL.jpg" noproxy>