Used on aircraft, eagle f-15;sot equipment (se),b-2 bomber. 3a thread class right-hand 0.501" thread length flat chamfer head style 40 thread quantity per inch anodize head surface treated unc thread series
3a thread class right-hand 0.317" grip length 32 thread quantity per inch 108000 single pounds per square inch shear strength cadmium or cadmium surface treated unjc thread series
3a thread class right-hand 0.368" thread length crowned hexagon head style 24 thread quantity per inch navy special project furnished with one retaining ring cadmium surface treated unjf thread series