2a thread class right-hand 0.391" thread length hexagon head style 0.062" grip length 20 thread quantity per inch drilled hole counterbored from shank end 0.116 in. dia unc thread series
Used on mrap - common nsn - 5 mrap variants and 11 other weapon systems. right-hand 22.0mm thread length hexagon head style grip length is 88.0mm oil surface treated m thread series