2a thread class right-hand 0.875" thread length hexagon head style 18 thread quantity per inch locking element in accordance with mil-f-18240, except prevailing passivate fastener surface treated unc thread series
Used on spec item. 3a thread class right-hand 0.641" thread length hexagon extended washer head style 7.703" grip length 24 thread quantity per inch drilled head unf thread series
3a thread class right-hand 0.323" thread length dished hexagon head style 4.052" grip length 32 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 4.492" thread length flat countersunk head style 24 thread quantity per inch cadmium or cadmium screw surface treated unjf thread series