Milton 1/4 MNPT 11/16 OD Reusable Hose End Fitting - 621-11, Air Couplers/ Fittings: Auto Body Toolmart
Pronese 2 Pack Soild Brass HPT Air Reusable Hose Splicer Repair Kit,Air Hose Fitting for 3/8-Inch ID Hose - Amazon.com
Husky 3/8 in. Field Repairable Hybrid Hose End HDA41000 - The Home Depot
Amazon.com: Premium Brass Reusable Repair Fitting For 3/8-Inch ID Hose,3/8" Barb For Polyurethane Air Hose with 1/4-Inch NPT Rigid (2Set 3/8inch) : Industrial & Scientific
Luckyweld Air Hose Repair Kit, 2 Pack 3/8-Inch Reusable Solid Brass Hose-End Repair Fitting (3/8 Inch 2 Pcs) - Amazon.com