Used on aircraft,( ac-130h, mc-130h, ec-130e, hc-130). 2b thread class right-hand 20 thread quantity per inch material is grade c per astm-A563 cadmium surface treated
Used on aircraft,( ac-130h, mc-130h, ec-130e, hc-130). 0.283" hole diameter 0.453" outside diameter for use with grade 2 through 8 bolts zinc surface treated two piece interlocking