Used on aircraft c-5, c-141, s-3b. 3a thread class right-hand 0.335" thread length double hexagon head style 1.000" grip length 24 thread quantity per inch nickel surface treated unjf thread series
2a thread class right-hand 0.438" thread length flat chamfer head style 32 thread quantity per inch slot 0.062 in. w by 0.062 in. deep cut in thd end unc thread series
3a thread class right-hand flush countersunk head style 0.693" grip length 28 thread quantity per inch 95000 single pounds per square inch shear strength unjf thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 1.094" grip length 5900 single pounds per square inch shear strength cadmium body surface treated
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 1.031" grip length 5900 single pounds per square inch shear strength cadmium body surface treated
3a thread class right-hand 0.380" thread length flat countersunk head style 0.677" grip length 32 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.586" thread length double hexagon w/hole head style 1.052" grip length 24 thread quantity per inch cadmium or cadmium or cadmium surface treated unjf thread series
3a thread class right-hand 0.506" thread length double hexagon w/hole head style 0.865" grip length 28 thread quantity per inch cadmium or cadmium surface treated unjf thread series
3a thread class right-hand 0.789" thread length double hexagon w/hole head style 1.740" grip length 20 thread quantity per inch cadmium or cadmium surface treated unjf thread series
3a thread class right-hand 0.560" thread length 18 thread quantity per inch with soft material in thd self-locking, 0.060 in. w slot in thd end unf thread series
