2a thread class right-hand 0.545" thread length 40 thread quantity per inch this screw is aprt 0f a assembly that consist of 2-female screwlock, 4-washers, 2-nuts zinc surface treated unc thread series
Used on 3431-01-079-8439. 2a thread class right-hand 1.750" thread length hexagon head style 13 thread quantity per inch hole centrally located, 0.230 in dp unc thread series
2a thread class right-hand 0.750" thread length hexagon head style 24 thread quantity per inch screw, machine, hexagon head with spring lockwasher, class 2a. cadmium or zinc surface treated unc thread series