Used on data recorder. 2a thread class pan no. 2 head style 40 thread quantity per inch with groove between shoulders passivate surface treated unc thread series
Used on miss-ii. 2a thread class right-hand 0.312" thread length dished hexagon head style 32 thread quantity per inch passivate surface treated unc thread series
3a thread class right-hand 0.480" thread length flat chamfer head style 26 thread quantity per inch undercut below head 0.093 in. max width, 0.020 in. min. head fillet radius; undercut below shoulder 0.125 in. max. width, 0.029 in. thru 0.035 in. thread neck fillet radius unc thread series
