ANCIMOON 3/4'' Straight Air Line Fittings, 3/4'' Tubing x 1/2'' Male NPT Threads Adapter Fittings, Brass-Nickel Plated, Seal Taped Needed, 1-PC For Garage Shop Compressed Air Piping System - Amazon.com
SMC KQB2F08-01-F fitting, nickel plated brass, ONE-TOUCH FIT
Morvat 3/4 in. Nickel Plated Brass Quick Connect/Disconnect Garden Hose Fittings, Female and Male Connections (2-Sets) MOR-NP-AQCONNECTOR-2-A - The Home Depot