Buy 1/2" Tube OD x 1/4" Male NPTF, Push-In Fixed Male Elbow, Brass Push-to-Connect Tube Fitting
Legris - Push-To-Connect Tube to Male & Tube to Male NPT Tube Fitting: Male Connector, 1/8″ Thread, 1/4″ OD - 48615181 - MSC Industrial Supply
Straight Pneumatic Push to Quick Connect Fittings Bulkhead Union 6mm Tube OD - Silver Tone,Black - Bed Bath & Beyond - 29791864
Push-to-Connect Male Straight Tube Fitting with Quick Release Feature – OxiKit, LLC
Amazon.com: Utah Pneumatic Push-To-Connect Fittings 5/16 Or 8MM"Od 1/4 Npt Air Elbow Union Air Line Tube Fittings Push In Fitting Pneumatic Push Elbow(10 Pack) : Industrial & Scientific
Push to Connect Tube Fitting,Adapter,8mm Tube OD x G1/4" Female Straight Pneumatic Connecter Pipe Fitting 4pcs - Walmart.com
Amazon.com: uxcell Push to Connect Tube Fitting Male Elbow 8mm Tube OD x G1/8 Thread Pneumatic Air Push Fit Lock Fitting Blue : Industrial & Scientific
1/4 tube (Push to Connect) to 1/8th NPT Male – Palmers Pursuit Shop
Amazon.com: Push to Connect Tube Fitting, Male Straight, 2 Pack (1/4 NPT Thread+ 3/8 Inch Hose) : Industrial & Scientific