Used on propulsion section. 3a 1st end thread class standard jic flare to metric boss with o'ring face seal connections zinc surface treated m 2nd end thread series
Used on nsn: 4930-01-517-7009 supply point fuel system. spool adapter, adapter 3"X3" adapter this is a 3 inch by 3 inch nipple adapter anodize surface treated
Used on mast subsystem. 2a 2nd end thread class soft seal tube to male pipe 316l stainless steel; boss end also has o'ring face seal groove npt 1st end thread series
Used on air subsystem. 2a 1st end thread class tube to o'ring boss o'ring not included for boss connection; 316l stainless steel unf 1st end thread series