Used on nsn 2320-01-371-9583 utility truck (hmmwv). 2a thread class right-hand 0.625" thread length flat chamfer head style 16 thread quantity per inch unc thread series
3a thread class right-hand 0.521" thread length flat countersunk undercut head style 24 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.505" thread length flat countersunk head style 24 thread quantity per inch passivate fastener surface treated unjf thread series