Stainless Steel Swagelok Tube Fitting, Union, 3/8 in. Tube OD | Unions | Tube Fittings and Adapters | Fittings | All Products | Swagelok
Amazon.com: 3/8 Air Fittings Push to Connect Fittings,CEKER 3/8 Inch Tubing Od x 3/8" NPT Thread Male Pneumatic Fittings Air Line Fittings Quick Connect Push in Connectors 5Packs : Industrial & Scientific