The Faithfull Hydraulic Coupler is a standard grease gun accessory designed to suit most greasing applications across a range of maintenance tasks. Engineered for reliability and longevity, this coupler features a spring-loaded ball check mechanism that prevents pressure loss during operation, ensuring consistent grease flow. Four fully hardened spring steel jaws provide exceptional durability for extended service life in demanding workshop and site environments. This hydraulic coupler is specifically designed for use with hand-operated grease guns with a working pressure of up to 3000psi (207bar). It features a standard 1/8in BSPT thread connection, making it compatible with Faithfull grease guns models FAI GGHD and FAI GGMP, as well as Faithfull flexible hoses FAI GGHOSE12 and FAI GGHOSE18. Ideal for vehicle maintenance, agricultural machinery servicing, and general lubrication tasks, this coupler delivers secure attachment to grease nipples while maintaining pressure integrity throu