The Hillman Group 44767 M6-1.00 Metric Hex Coupling Nut， 12-Pack<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Coupling nuts are threaded fasteners for joining two male threads， most commonly threaded rod</li><li>Coupling Nuts are used to make up long rod assemblies from shorter lengths of rods</li><li>Steel/Zinc Plated</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41NURBJ4rtL.jpg" noproxy>