Eaton Aeroquip 210292-6S Cap for Male JIC Fitting, JIC 37 Degree End Types, Carbon Steel, 3/8 JIC(f) End Size, 3/8" Tube OD (Pack of 4) Cap for closing the end of a fitting JIC threads to cap a JIC male end Carbon steel for tensile strength and hardness Standard duty for light to medium pressure applications Society of Automotive Engineers (SAE)-compliant for SAE standards J512, J513, J514, J1926 and J1453 for functional requirements