A hex nut which is only 2/3 the thickness of a full form nut.
Jam nuts are tightened against the work surface and a finished or heavy hex nut is tightened against the jam nut to keep it from loosening.
Made from low carbon zinc plated steel.
Proof load: 54,000 psi.
Zinc plated.
Size: 3/4″-10.
A hex nut which is only 2/3 the thickness of a full form nut. Jam nuts are tightened against the work surface and a finished or heavy hex nut is tightened