Foster/ZSI Brass Quick Disconnect 1/8″ Female (Slide Check QD)

Foster/ZSI Brass Quick Disconnect – 1/8″ Female – Slide Check QD

The Foster/ZSI Brass Quick Disconnect in 1/8″ Female Slide Check configuration is a brass female Foster-pattern quick disconnect fitting for HPA airsoft airline connections. Foster-pattern QD fittings are the dominant quick-disconnect standard in HPA airsoft — they allow the airline to be disconnected from the engine or regulator with a single pull by retracting the slide check collar, and reconnected by pushing the male fitting into the female until it clicks. The slide check design ensures the connection does not pull out unintentionally under tension on the line.

1/8″ BSP/NPT thread — the most common thread size for HPA airline connections in airsoft. Female end — mounts to the rifle-side port (engine or inline connection point). Brass construction for corrosion resistance and durability under repeated connection cycles at operating pressure. For HPA players replacing a worn female QD fitting on the engine side or building a new airline run, this is the standard Foster female slide check QD in the correct 1/8″ thread specification.

• Foster/ZSI Brass Quick Disconnect — Female Slide Check QD
• 1/8″ BSP/NPT thread
• Slide check — prevents unintentional disconnection under line tension
• Brass construction — corrosion resistant
• Female end — engine or rifle-side mounting