2a thread class right-hand 0.295" thread length pan head style 40 thread quantity per inch furnished with boot type nylon washer 0.312 in. o.d, head unc thread series
2a thread class right-hand 0.460" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.503" thread length dished hexagon head style 3.000" grip length 20 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.375" thread length flat chamfer head style 24 thread quantity per inch passivate fastener surface treated unc thread series