PEM Tri-Dent self-clinching steel locknuts incorporate an innovative locking feature to meet demanding locking performance requirements and promote the reliability of locking threads for thin-metal component assemblies.

The Tri-Dent locking feature can achieve locking torque specifications ranging from (maximum torque) 0.67Nm to 4Nm and (minimum torque) 0.04Nm to 0.30Nm, depending on the fastener thread size.

These self-clinching locknuts (Type SL) provide permanent load-bearing threads in steel or aluminium sheets as thin as 1mm and, upon installation, they become an integral part of an assembly. They are available in metric threads M3 through to M6, as well as unified thread sizes #4-40 through to 1/4-20.

The locknuts are quick and easy to install by placing the locknut in a properly sized punched or drilled hole and applying sufficient force using a standard press to embed the fastener's clinching ring completely in the metal sheet. All clinching is performed on the fastener side of the sheet, allowing the reverse side to remain flush and smooth without protrusions.

Bulletin CL can be downloaded free in PDF format and free part drawings can be found in the PEM CAD Library from the Penn Engineering website.

Tri-Dent SL locknuts

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