3a thread class right-hand 1.161" thread length dished hexagon head style 4.740" grip length 14 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.398" thread length flat countersunk head style 0.423" grip length 28 thread quantity per inch F0.138-32unjc-3b threaded hole, 0.300 in. min unjf thread series