Sparex source: https://us.sparex.com/grease-gun-coupler-1-8-npt-130055.html Product: Grease Gun Coupler 1/8 NPT - Sparex S.130055 SKU: S.130055 Listing note: Convenient Push-On engagement with disengagement under pressure via the spring lever6 hardened cylindrical balls hold coupler to grease fitting until releasedFits all types of grease fitting head profiles - Metric, SAE, BS, ISI, JS etc.For hand, air & battery operated grease equipmentHigh pressure up to 8,000 PSI Detail enrichment pending: OEM cross references, fitment, catalog pages, and full specifications.