Used on british army mastiff 2 vehicle; mrap buffalo mk2a2. 2b thread class right-hand 20 thread quantity per inch nut, hex prev torq 1/4-20 gr c prevailing torque zinc surface treated
Used on mk105 power supply ptu-18/m. 0.539" hole diameter 0.748" outside diameter 0.040" material thickness navy special project paint surface treated serrated