PCL Unions & Reducers - 1/4 3/8 1/2 BSP Airline Fittings Air Compressor Reducing | eBay
Air line / Hose Connector and Coupler 1/4" 3/8" 1/2" BSP barb and bayonet | eBay
97302 Reusable Air Fitting 3/8" Hose-1/4" MNPT | Imperial Supplies
12pc Quick Release Connector Set Air Line Compressor Fitting 1/4" 3/8" BSP | DIY at B&Q
PCL Decreasing Bush Male 1/4" to Female 3/8" BSP Air Hose Step Down Fitting - AB Tools Online
6mm x 3/8 BSPT Male Stud Push-in Fitting Nylon Pipe/Tube air line pushfit Joiner Connector UK
Air line / Hose Connector and Coupler 1/4" 3/8" 1/2" BSP barb and bayonet | eBay
TAISHER 10 PCS Brass of Air Hose Fittings, Hose Barb Fittings 3/8" Hose Barb x 3/8" FNPT with 10 PCS Hose Clamp : Amazon.co.uk: Garden
2stk Air Line Connectors 3/8" BSP Euro Airline Hose Compressor Fittings Air Coupler and Plug Kit Couplings Connector Female : Amazon.co.uk: DIY & Tools
Brass DN 5 Air Coupling Plug G 3/8 inch Male [5 Pieces] | Tameson.co.uk