Used on 2350-01-553-4634 mine resistant vehicle (mrap). 2b thread class right-hand 20 thread quantity per inch standard pilot 6 projection hex weld nut pilot diameter 0.394-0.406 min-max inch, pilot height 0.080-0.090 min-max inch
Used on B-1. 2b thread class right-hand 18 thread quantity per inch nut, plain hexagon 3 safety wire holes 0.042 dia equally spaced anodize surface treated