The Hillman Group 4667 5/16-18 x 1-Inch - USS Socket Set Screw， 10-Pack<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Ideal for use in confined areas where the head needs to be flush or below the surface</li><li>Fully threaded headless screw with a recessed hex drive</li><li>For mechanical applications</li></ul></div><img src="http://ecx.images-amazon.com/images/I/519utP9VUoL.jpg" noproxy>