Used on F100. 3a thread class right-hand 0.615" thread length headless (setscrew) head style 20 thread quantity per inch passivate surface treated unc thread series
Used on F-100. 3a thread class right-hand 0.335" thread length hexagon head style 36 thread quantity per inch bolt item is fracture/durability critical; is an aviation critical safety item/flight safety critical part unjf thread series
Used on eh101 helicopter. 0.873" inside diameter 1.023" outside diameter 0.025" major thickness spiral ring style 211000.0 pounds per square inch tensile strength rating phosphate surface treated
2a thread class right-hand 0.589" thread length pan head style 56 thread quantity per inch passivate screw surface treated magnetic permeability shall not exceed 2.0 after fabrication unc thread series
3a thread class right-hand 0.170" thread length flat chamfer head style 40 thread quantity per inch magnetic permeability shall not exceed 2.0 after fabrication passivate surface treated unc thread series