2b thread class right-hand 0.592" material thickness 56 thread quantity per inch navy special project three additional holes 0.100 in. dia thru, 0.190 in. dia countersink to 0.095 in. dp chromate surface treated
2b thread class right-hand 0.068" material thickness 40 thread quantity per inch 1.852 in. c to c btwn holes; ctr cutout, one side; corners cut 45.0 deg passivate surface treated
3b thread class right-hand 20 thread quantity per inch brislube molybdenum disulfide dry film lubricant coated per mil-8937 (kal-gard type "fa" only passivate surface treated