{"product_id":"locknlube-giant-button-head-grease-coupler-7-8-1-8-fnpt-3-000-psi-working-pressure","title":"LockNLube Giant Button Head Grease Coupler 7\/8\" – 1\/8\" FNPT, 3,000 PSI Working Pressure","description":"\u003cp\u003e\u003cstrong\u003eThe LockNLube Giant Button Head Coupler 7\/8\" is a heavy‑duty grease coupler engineered to fit 7\/8\" button‑head grease fittings for high‑volume lubrication work.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for mechanics, fleets, and industrial maintenance teams, this coupler provides a secure, high‑flow connection to oversized button head fittings. It combines a robust pressure rating with a 1\/8\" FNPT connection, making it simple to integrate with standard grease guns and hoses for fast, reliable lubrication of bearings, pivots, and large fittings.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the 7\/8\" Giant Button Head Coupler handle high‑volume grease jobs?\u003c\/h3\u003e\n\n\u003cp\u003eThe oversized 7\/8\" opening and internal geometry let grease pass quickly without bogging down the gun. That makes it well suited for large bearings and heavy equipment that require generous amounts of grease per cycle.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e7\/8\" (22 mm) button‑head compatibility for large fittings\u003c\/li\u003e\n  \u003cli\u003eRated to 4,000 PSI for peak pressure tolerance\u003c\/li\u003e\n  \u003cli\u003eWorking pressure of 3,000 PSI for regular operation\u003c\/li\u003e\n  \u003cli\u003e1\/8\" FNPT thread for easy attachment to common grease hoses\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this coupler stay attached to button‑head fittings during use?\u003c\/h3\u003e\n\n\u003cp\u003eYes — the coupler’s design provides a secure engagement around button‑head fittings to minimize slippage while pumping grease. Its geometry and material choice reduce the likelihood of blow‑offs under normal working pressures.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSnap‑on\/press fit profile for firm seating on 7\/8\" heads\u003c\/li\u003e\n  \u003cli\u003eDurable construction resists deformation under load\u003c\/li\u003e\n  \u003cli\u003eCompatible with typical grease gun coupling techniques\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I connect the LockNLube coupler to my existing equipment?\u003c\/h3\u003e\n\n\u003cp\u003eConnecting is straightforward: thread the coupler onto a matching 1\/8\" FNPT hose or adapter, then press the coupler onto the 7\/8\" button head and operate the grease gun as usual. No special tools are required for standard installations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThread: 1\/8\" FNPT fits standard grease hoses and adapters\u003c\/li\u003e\n  \u003cli\u003eInstallation: hand‑tighten or use common plumbing tools as needed\u003c\/li\u003e\n  \u003cli\u003eWorks with high‑capacity grease guns and pneumatic systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat pressures and conditions is this coupler rated for?\u003c\/h3\u003e\n\n\u003cp\u003eThe Giant Button Head Coupler is built for demanding environments and is rated for both working and peak pressures encountered in heavy lubrication tasks. It’s intended for grease, not for pneumatic fluids or hazardous media.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWorking pressure: 3,000 PSI for routine use\u003c\/li\u003e\n  \u003cli\u003eMaximum rating: 4,000 PSI for intermittent peaks\u003c\/li\u003e\n  \u003cli\u003eIdeal for high‑volume, heavy‑equipment lubrication cycles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: The LockNLube Giant Button Head Coupler 7\/8\" is aimed at professional mechanics, agricultural and construction maintenance crews, fleet service shops, and anyone who services large bearings or heavy machinery that uses 7\/8\" button‑head grease fittings. If you need fast grease delivery, a dependable hookup, and compatibility with standard 1\/8\" FNPT hoses, this coupler is built to meet those needs.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the LockNLube coupler compatible with standard grease guns?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It uses a 1\/8\" FNPT connection that fits common grease hoses and adapters for most grease guns.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What pressure can the 7\/8\" coupler safely handle?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Working pressure is 3,000 PSI with a maximum rating up to 4,000 PSI for peak conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"LockNLube","offers":[{"title":"Default Title","offer_id":55168460325207,"sku":"B0D9HYZW62","price":39.55,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/locknlube-giant-button-head-coupler-front-view.jpg?v=1790404654","url":"https:\/\/britishgarage.co.uk\/products\/locknlube-giant-button-head-grease-coupler-7-8-1-8-fnpt-3-000-psi-working-pressure","provider":"British Garage","version":"1.0","type":"link"}