The Milton Industries MIL-S601 Milton S-601 1/4 MNPT 5/16 ID Hose End Fitting are a pack of two 1/4 MNPT 5/16 ID hose end fittings. These fittings are made from brass and are designed to fit onto 1/4 MNPT 5/16 ID hose ends. These fittings are compatible with Milton Industries MIL-S601 Milton S-601 1/4 MNPT 5/16 ID Hose Ends.