3a thread class right-hand 1.761" thread length flat countersunk head style 28 thread quantity per inch cadmium screw surface treated unjf thread series
2a thread class right-hand 0.378" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unjc thread series
2a thread class right-hand 0.678" thread length 32 thread quantity per inch navy special project color black neophrene cap on head per mil-r-3065 type s class sb grade 410 unc thread series
2a thread class right-hand 0.875" thread length distorted head head style 18 thread quantity per inch 6 slots in top of head at any angle relative to the hexagon unc thread series
3a thread class right-hand 0.428" thread length pan head style 0.615" grip length 20 thread quantity per inch cadmium surface treated unjf thread series
