Used on mrap - m-atv with cs13 pop and sne. 2a thread class right-hand 1.250" thread length hexagon head style 20.0 thread quantity per inch unc thread series
3a thread class right-hand 0.75" thread length flat fillister head style 16 thread quantity per inch self locking via nylon patch bonded to threads unc thread series
Used on power plant,utility. 2a thread class right-hand 0.384" thread length flat countersunk head style 24 thread quantity per inch screw, machine unc thread series