The Light Source Mega-Coupler with Flat Head Bolt and Metric Hardware, Nyloc Nut, Silver MLM-M12CS-NN

“The Countersunk Mega-Coupler replaces the standard hex head bolt with a flat head bolt.

The Countersunk Mega-Coupler comes with a 1/2″” or 3/8″” flat head base and comes standard with a heavy duty wing nut developed by The Light Source. Other nut options include a steel wing nut or a nylock nut.

For metric requirements, the M10 and M12 flat head bolt is available as well.”