3a thread class right-hand 0.225" thread length flat countersunk head style 28 thread quantity per inch passivate screw surface treated unjf thread series
3a thread class right-hand 1.500" thread length flat chamfer head style 13 thread quantity per inch navy special project cadmium fastener surface treated unrc thread series
3a thread class right-hand 0.392" thread length double hexagon w/hole head style 0.060" hole diameter 0.125" grip length 28 thread quantity per inch heat treated per pwa 36545-3 cagec 77445 on point unjf thread series