Used on nsn 2320-01-522-7781 bracket, mounting. 3b thread class right-hand flat countersunk head style 16 thread quantity per inch nut, plain, blind rivet-flat grip range .466-.551 passivate surface treated
Used on mrap - rg-33. 0.193" hole diameter 0.334" outside diameter 0.047" material thickness carbon steel material phosphate surface treated split helical-right hand