Amflo CP21 1/4" Coupler Plug (Type D Industrial FNPT) Male Threaded
Milton HIGHFLOWPRO™ V-Style/European Interchange Pneumatic Coupler and Plug Fitting Kit 1/4-in NPT 6 PC in the Air Compressor Fittings department at Lowes.com
Pneumatic Fitting Air Compressor Quick Connector | Connect Air Compressor Fittings - Pneumatic Parts - Aliexpress
Air Line Quick Coupling Connector Coupler Adapter | Air Compressor Coupling Adapter - Pneumatic Parts - Aliexpress
AMP 4-Terminal Plug Connector Kit StdSx
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COUPLER PLUG, PLASTIC 1 16,0 MM
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Powerplay 1/4 in. Male to Male Quick-Connect Plug Coupler for Pressure Washer PWXA001 - The Home Depot