Used on aircraft, hercules c-130; aircraft, hornet f/a-18; aircraft, eagle f-15;helicopter observation (ahip), oh-58d; aircraft, f-16; aircraft, stratolifter c-135; aircraft, ac-130h, mc-130h, ec-130e, hc-130; aircraft, phantom f-4. flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.501" grip length ns" letters after the material code "b" indicate no preference to lock type (may be visible or internal) . rivets with no letter code (indicating visible lock type) chromate sleeve surface treated
3a thread class right-hand 0.515" thread length flat chamfer head style 32 thread quantity per inch head vertically knurled anodize head surface treated unc thread series
2a thread class right-hand 0.280" thread length flat chamfer head style 0.270" grip length 28 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.505" thread length flat countersunk undercut head style 24 thread quantity per inch furnished with one o-ring passivate surface treated unjf thread series
3a thread class right-hand 0.380" thread length flat countersunk undercut head style 32 thread quantity per inch furnished with one o-ring passivate surface treated unjf thread series
3a thread class right-hand 0.372" thread length oval countersunk head style 28 thread quantity per inch internal hexagon socket in threaded end 0.0947 in. min passivate surface treated unjf thread series
3a thread class right-hand 0.372" thread length oval countersunk head style 28 thread quantity per inch internal hexagon socket in threaded end 0.0947 in. min passivate surface treated unjf thread series
2a thread class right-hand 0.415" thread length flat chamfer head style 32 thread quantity per inch undercut head passivate surface treated unf thread series
3a thread class right-hand 0.345" thread length dished hexagon head style 0.365" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
2a thread class right-hand 3.000" thread length 7.000" overall length 13 thread quantity per inch furnished with one hex nut welded on threads 1.130 in. from threaded end chromate zinc surface treated round, closed unc thread series
Used on crane; tractor a/s32u-30; cargo truck, 5 ton. 2a thread class right-hand 1.125" thread length hexagon head style 14 thread quantity per inch unc thread series
Used on spec item. 3a thread class right-hand 0.620" thread length hexagon head style 0.042" hole diameter 0.072" grip length 32 thread quantity per inch nickel surface treated unjf thread series
