Used on 5420-01-430-5403. 2a thread class right-hand 1.500" thread length hexagon head style 18 thread quantity per inch protective finish according to 1.9.2.3, mil-std-171, shall be electrodeposited zinc, type ii with supplementary chromate treatment .0003inches thick, to be bronze or olive drab in color unc thread series
Used on aircraft carrier cvan 68. 2a thread class 20 thread quantity per inch used on: hatches-ballistic-flt dk catapult officers emer cont.station arr & dets; used as: fhms screw unc thread series
Used on aircraft carrier cvan 68. 2a thread class 13 thread quantity per inch navy special project cadmium screw surface treated used on: hatches-ballistic-flt dk catapult officers emer cont. station arr & dets; used as: fhms screw unc thread series
3a thread class right-hand 18 thread quantity per inch zinc screw surface treated mscrews to be self-locking element must be a non metallic patch in accordance with mil-f-18240 except that prevailing unc thread series
Used on acft carrier cvan 69. 3a thread class right-hand 24 thread quantity per inch navy special project cadmium screw surface treated unc thread series
Used on chinook helicopter. 2a thread class right-hand 0.554" thread length flat countersunk head style 56 thread quantity per inch cadmium screw surface treated unf thread series
3a thread class right-hand 0.226" thread length fillister head style 32 thread quantity per inch passivate screw surface treated flat fillister head unjc thread series
Used on fixed wing aircraft, c130j hercules, lockheed martin corp. 3a thread class right-hand flat countersunk head style 24 thread quantity per inch cadmium screw surface treated unjf thread series