5/8" OD Brass Hose Ferrule | Milton Industries — Milton® Industries Inc.
Amazon.com: SILATU Air Hose Repair Kit - 3/8 Inch Air Hose Fittings, Solid Brass Reusable Air Hose Splicer 3/8 Inch Barb x 3/8 Inch NPT Rigid, 2PCS : Industrial & Scientific
500 ID Brass Ferrule - 3084 - Diamond-U
For Water/Heavy Duty Air Hose Type, 5 Die Set, Hose Crimper - 6CEC4|6CEC4 - Grainger
Milton 21/32 in. O.D. Brass Hose Ferrule (Box of 100) 1654-6BK - The Home Depot