Used on ship, ohio class ssn (trident);aircraft,b-2 bomber (atb). 3a thread class right-hand 0.363" thread length flat countersunk head style 32 thread quantity per inch unjf thread series
3a thread class right-hand 5.750" thread length flat chamfer head style 8 thread quantity per inch navy special project aluminum fastener surface treated unrc thread series
2a thread class right-hand 0.188" thread length button head style 32 thread quantity per inch navy special project oxide surface treated unc thread series
3a thread class right-hand 0.425" thread length flat countersunk head style 0.490" grip length 28 thread quantity per inch passivate surface treated unjf thread series
2.351" inside diameter 2.801" outside diameter 0.090" major thickness special flat ring style 175000.0 pounds per square inch tensile strength rating passivate surface treated