Fittingstore compressed air coupling socket with external thread NW 7.2 - G1/8 inch - G1/4 inch - G3/8 inch - G1/2 inch (G 1/2 inch) : Amazon.de: DIY & Tools
Schrader 17 Series Female Coupler 1/4" BSP Female Thread & Male Adaptors Fitting : Amazon.ca: Tools & Home Improvement