Dome-Style Prevailing-Torque Locknut

The DOME-LOC® is an automation-style locknut, available with a top or oval lock feature that accommodates automated processes. These proven locknuts are available in American Standard and Metric, hex-finished, jam, heavy, hi, square, acorn, weld, track, and flange nuts.

DOME-LOC locknuts can also be ordered in Tri-Loc or Oval-Loc Configurations. For special applications, these locknuts are available in 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, mechanically galvanized, and other platings and coatings