The Hillman Group 45035 3/8-16 x 6 Stainless Steel Hex Cap Screw USS， 4-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>Hex head cap screws come in a variety of sizes， finishes， grades and threads</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31q4jnFzvcL.jpg" noproxy>