The Hillman Group 43474 9/16-18-Inch Stainless Steel Jam Nut， 6-Pack<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Often used when a nut needs to be locked in place without clamping against another object</li><li>They can also be used to secure an item on a fastener without applying force to that object</li><li>Stainless Steel finish</li></ul></div><img src="http://ecx.images-amazon.com/images/I/414CV24P7oL.jpg" noproxy>