Our standard screw jack jam nuts are available in both steel or aluminum for 1″ coarse, 3/4″ coarse, and 1-1/8″ fine thread screw jack bolts. The 1″ and 3/4″ jam nuts use an 1-1/8″ wrench, while the 1-1/8″ jam nuts use an 1-1/4″ wrench.
Sold as a set of 4.
