3a thread class right-hand 0.740" thread length double hexagon extended washer head style 28 thread quantity per inch silver surface treated unjf thread series
2a thread class right-hand 0.348" thread length flat countersunk head style 32 thread quantity per inch passivate screw surface treated paint top of head per p/n 133C133, cagec 97942 unc thread series
3a thread class right-hand 0.569" thread length pan no. 2 head style 3.490" grip length 24 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.433" thread length flat countersunk head style 56 thread quantity per inch passivate fastener surface treated unjc thread series
