Eaton Aeroquip 1290-6S Steel Versil-Flare Flared Tube Fitting, Nut, 3/8" Tube OD, 9/16" Female JIC (Pack of 10) Flare tube fitting nut for use with Eaton Aeroquip 900605 tube sleeves and SAE 37-degree flare bodies in hydraulic applications 9/16-18 female JIC threaded connection for use with 3/8" OD tubes Zinc-plated steel for strength, durability, and resistance to corrosion Meets MIL-SPEC MIL-F-18866 and SAE J514 standards for hydraulic tube fittings