2a thread class right-hand 0.450" thread length pan no. 2 head style 40 thread quantity per inch passivate screw surface treated silicone rubber o ring self sealing under head unc thread series
3a thread class right-hand 0.375" thread length flat countersunk head style 0.365" grip length 24 thread quantity per inch aluminum surface treated unjf thread series
3a thread class right-hand 0.715" thread length 20 thread quantity per inch threads undercut for relief cadmium surface treated swivel unjf thread series