Best Fittings | Dust Plug Foster Male | Silver

Stofplug Foster Male – Protective cap for Foster quick-connect couplings

This dust plug from Best Fittings protects Foster couplings from contamination when not in use. The accessory features a male Foster connector that fits Foster 12FS, 12FSS and 12MS Straight Thru Quick Snap couplings, preventing dust, dirt and moisture from entering your compressed air system.

Construction and materials

The plug features a robust silver metal construction with knurled grip surface for easy installation and removal. A red safety cord is included to prevent loss during field use. The male Foster fitting creates an airtight seal when inserted into female Foster couplings.

Application and use

This accessory serves dual purposes: protecting couplings during transport and storage, and enabling pressure testing of PCP airguns or HPA systems. By pressurising the system with the plug installed, you can check for leaks in air cylinders or fill sets without connecting complete charging equipment.

Integration and compatibility

The plug is compatible with all standard Foster female couplings commonly found on PCP airguns, HPA airsoft systems and compressed air fill sets. The male Foster connector clicks securely into place and maintains system pressure integrity.

Maintenance and lifecycle

The metal construction requires minimal maintenance beyond occasional cleaning. Regular use prevents O-ring degradation in Foster couplings by keeping contaminants out of the sealing surfaces.