Best Fittings new socket has been designed to allow connection to “Foster Type” fill nipples that are recessed deeply within the gun stock. The release collar is a 30mm long, as opposed to the standard 10.5mm long coupler.

Suitable for FX deep recess stocks, Daystate and Brocock deep recess stocks early “Swift” and “Dr Bobs” type Theoben & BSA Superten quick fills without the need for an additional coupler release tool. Also suits converted air tubes where the fill nipple has been installed after removing the pressure gauge from the recessed end of the air tube.

Available with the UK industry standard 1/8″ BSP Male thread that suits most pump and cylinder fill lines.Safe for use on all pre-charged equipment with a Max Working Pressure of 340BAR, 5000psi. Do not exceed these maximum working pressure.