PEM Tri-Dent self-clinching steel locknuts incorporate a unique locking feature to meet demanding locking performance requirements and promote reliability of locking threads for thin-metal component assemblies. Their TRI-DENT locking feature can achieve locking torque specifications ranging from (maximum torque) 5.75 in. lbs./0.67 N•m to 35 in. lbs./4 N•m and (minimum torque) 0.4 in. lbs./0.04 N•m to 3.75 in. lbs./0.30 N•m, depending on fastener thread size. These self-clinching locknuts (Type SL) provide permanent load-bearing threads in steel or aluminum sheets as thin as .040”/1mm and, upon installation, they become integral parts of an assembly. They are available in unified and metric thread sizes #4-40 through 1/4-20 and M3 through M6.