2b thread class right-hand 32 thread quantity per inch wrench flats on periphery 0.240 in. min 0.260 in. max. width across flats on flange passivate surface treated
Used on part of the right hand side armor kit 2540-01-533-8814; nha nsn m915a3 armor kit 2540-01-523-1336; armored version of m915a3 2320-01-523-2486. 0.250" hole diameter zinc surface treated