3a thread class right-hand 0.519" thread length flat countersunk head style 28 thread quantity per inch screw, self-locking, flat 100 deg head, full thread unjf thread series
3a thread class right-hand 0.499" thread length hexagon head style 28 thread quantity per inch bolt, machine, aircraft, drilled head, fine thread cadmium surface treated unf thread series
3a thread class right-hand 0.519" thread length hexagon head style 24 thread quantity per inch bolt-full threaded, 160 ksi steel, drilled head passivate surface treated unjf thread series
Used on paxman diesel engine. screw this nsn is for a part for the paxman diesel engine valenta model part number 16RP200m nsn 2815-99-739-4949 used on navy pc class of ships
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.550" grip length 11350 double pounds per square inch shear strength rivet blind passivate bolt surface treated
3a thread class right-hand 1.125" thread length double hexagon extended washer head style 28 thread quantity per inch oxide screw surface treated unrf thread series
Used on mrap buffalo mk2a2. A2a thread class right-hand 1.500" thread length dished hexagon head style 11 thread quantity per inch temperature rating on lockpatch is -65f to +250f chromate zinc surface treated unc thread series