SHEAR NUT AN320-4 1/4-28

Made from steel. Cad plated to QQ-P-416A, Type II, Class 3.  AN320 castle nuts for use with drilled-shank bolts, clevis bolts, eye bolts and studs. The slots in the nut are for a cotter pin to lock for safety. The  AN320 is a thinner castellated nut, with half the tensile rating of the AN310 nut.