Prevailing-Torque Oval Locknut

The O-LOC employs an oval-shaped locking feature on two sides at the top of the nut to create frictional thread interference during installation. O-LOC locknuts can be specified in American Standard and Metric sizes; hex-finished, jam, heavy, hi, and square nuts, along with a choice of special light or heavy torque versions.


Steel Grade 2-5-8, 2H/DH, Monel, brass, bronze, aluminum alloys, and stainless steel


UNC, UNF or 8UN Series, Class 2B, 3B, left-hand thread, and Metric


Plain, zinc, cadmium, and other platings and coatings