Series 90Reusable hose fittings - hose to pipe. Brass nipple and ferrule, steel socket.Male taper pipe rigid:20190-2-4: Thread size 1/8-27. Hose size: -4.20190-4-4: Thread size 1/4-18. Hose size: -4.SAE(JIC) 37 swivel:20690-4-4: Thread size 7/16-20. Hose size: -4.N.B. Picture for illustrative purposes only.