LTWFITTING 5/8 in. ID Hose Barb x 3/8 in. MIP Lead Free Brass Adapter Fitting (5-Pack) HFLF39189005 - The Home Depot
Coolant Heater Hose Fitting 3/8" NPT Male to 5/8" Hose Barb Male STEEL DOR | eBay
Water Hose Barb, 5/8" x 3/4" GHT Male, Brass
Amazon.com : 4 Sets 5/8 Inch Solid Brass Garden Hose Mender End Repair Kit Water Hose Coupling Splicer Mender Female Male Hose Connector with Tape, Stainless Steel Clamp and 3/4 Inch Rubber