The Hillman Group 43815 M12-1.25 Metric Hex Jam Nut, 10-Pack

Package Quantity:1 Product Description A jam nut is a low profile nut, half as tall as a standard nut. Used as a type of locknut where it is jammed up against a standard lock nut to lock the two in place. Also used where a standard nut would not fit. From the Manufacturer A jam nut is a low profile nut, half as tall as a standard nut. Used as a type of locknut where it is jammed up against a standard lock nut to lock the two in place. Also used where a standard nut would not fit.