Used on 3815-01-597-5671. 2a external thread class right-hand external 20 external thread quantity per inch zinc surface treated unf external thread series
Used on 2355-01-481-8575; light armored vehicle. 2b internal thread class 18 internal thread quantity per inch cap-37 deg flare unf internal thread series
Used on next generation radar (nexrad). item is a cap, hose 3/4 inch with chain; nsn restricted to use by the nws depot team only; material is brass with a rubber seal