Used on an/pas-13d(v) 2, (v) 3; sight, thermal for medium and heavy weapons. 2a thread class right-hand 0.337" thread length flat countersunk undercut head style 40 thread quantity per inch fastener, 4-40 x .313 x 100 degree fh, ss, blk oxide, w/ vibra-tite (phillips) oxide surface treated unc thread series
Used on airborne radar astor. 3a thread class right-hand 0.750" thread length double hexagon w/hole head style 28 thread quantity per inch unjf thread series
3a thread class right-hand 0.553" thread length dished hexagon head style 4.115" grip length 24 thread quantity per inch cadmium surface treated unjf thread series
Used on p3-c orion aircraft. 3a thread class right-hand flush countersunk head style 0.870" grip length 24 thread quantity per inch cadmium surface treated unf thread series
Used on b757 aircraft. 3a thread class right-hand 0.370" thread length dished hexagon head style 0.115" grip length 28 thread quantity per inch unjf thread series
3a thread class right-hand 0.669" thread length dished hexagon head style 1.365" grip length 20 thread quantity per inch bolt, hex head cadmium surface treated unjf thread series
3a thread class right-hand flush countersunk head style 0.807" grip length 24 thread quantity per inch 95000 single pounds per square inch shear strength cadmium surface treated unjf thread series
3a thread class right-hand straight pan head style 1.000" grip length 28 thread quantity per inch oversize parts for repair only cadmium surface treated unjf thread series
3a thread class right-hand straight pan head style 0.750" grip length 28 thread quantity per inch oversize parts for repair only cadmium surface treated unjf thread series
3a thread class right-hand flush countersunk head style 0.875" grip length 24 thread quantity per inch 95000 single pounds per square inch shear strength cadmium surface treated unjf thread series
Used on an/pas-13d(v)2,(v)3,sight,thermal for medium and heavy weapons. right-hand flat countersunk head style 56 thread quantity per inch thread shall be circumferentially coated using vibra-tite VC3 coating thickness/buildup shall be 30% thread depth x 1.5 diameter.