{"product_id":"locknlube-locking-grease-gun-coupler-1-8-npt-universal-rebuildable-10-000-psi-thumb-lever-release","title":"LockNLube locking grease gun coupler 1\/8\" NPT — universal rebuildable 10,000 PSI, thumb-lever release","description":"\u003cp\u003e\u003cstrong\u003eLockNLube Grease Coupler 1\/8\" NPT is a universal, locking grease gun coupler that snaps onto zerk fittings and holds securely under pressure up to 10,000 PSI.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact, rebuildable coupler is engineered to speed maintenance by giving you a hands-free connection to SAE and metric Zerk fittings. It fits standard grease guns (manual, battery, or pneumatic) via a 1\/8\" NPT threaded inlet, features a convenient thumb lever for release under pressure, and includes a spare rebuild kit so the tool stays serviceable for years. The design focuses on minimizing leaks and mess while allowing access to tight or hard-to-reach grease points.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the LockNLube coupler stay attached during greasing?\u003c\/h3\u003e\n\u003cp\u003eThe coupler uses a positive locking jaw that grips the Zerk fitting and holds under back pressure so you can use both hands to operate the grease gun. The lock-on action prevents slippage and reduces mess from repeated attempts to seat the coupler.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLocking jaw secures the fitting for hands-free operation\u003c\/li\u003e\n  \u003cli\u003ePatented thumb lever opens jaws for quick removal even under pressure\u003c\/li\u003e\n  \u003cli\u003eRated to 10,000 PSI to withstand high-pressure applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this fit my grease gun and fittings?\u003c\/h3\u003e\n\u003cp\u003eYes—LockNLube’s 1\/8\" NPT inlet threads are compatible with the majority of grease guns, including manual, battery-powered, and pneumatic models. The coupler accepts both SAE and metric Zerk (grease) fittings, so it works across most vehicles and industrial equipment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/8\" NPT thread matches common grease gun connectors\u003c\/li\u003e\n  \u003cli\u003eCompatible with SAE and metric Zerk fittings for broad equipment coverage\u003c\/li\u003e\n  \u003cli\u003eCompact profile reaches recessed grease points and tight spaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I maintain or repair the coupler?\u003c\/h3\u003e\n\u003cp\u003eMaintenance is straightforward because the product is rebuildable and ships with a spare rebuild kit. Regular cleaning and replacing the small internal seals as needed keeps the coupler sealing properly and prolongs service life.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes rebuild kit for quick seal and spring replacement\u003c\/li\u003e\n  \u003cli\u003eSimple disassembly for cleaning and part replacement—no specialty tools required\u003c\/li\u003e\n  \u003cli\u003eParts are replaceable to avoid full-unit disposal and lower long-term cost\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the LockNLube coupler safe and reliable for heavy-duty jobs?\u003c\/h3\u003e\n\u003cp\u003eThe unit is designed for demanding maintenance work and is rated up to 10,000 PSI, matching the needs of many professional applications. Its locking mechanism and pressure-rated construction help minimize accidental detachments and grease spray.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e10,000 PSI rating for heavy-duty compatibility\u003c\/li\u003e\n  \u003cli\u003eSecure lock-on design reduces leaks and stray grease\u003c\/li\u003e\n  \u003cli\u003eOne-year warranty covers manufacturing defects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The LockNLube Grease Coupler 1\/8\" NPT is ideal for mechanics, fleet maintenance crews, farmers, heavy-equipment technicians, and DIYers who service machinery frequently and need a dependable, low-mess solution. If you want faster greasing, fewer retries to seat the coupler, and the ability to service both SAE and metric fittings with a single tool, this coupler was built for your workflow.\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: Does the coupler fit battery-powered grease guns?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 1\/8\" NPT inlet fits manual, battery, and pneumatic grease guns for broad compatibility.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What do I do if the coupler starts to leak?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use the included rebuild kit to replace seals and springs; clean internal parts before reassembly.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"LockNLube","offers":[{"title":"Default Title","offer_id":48083139494046,"sku":"B00H7LPKKU","price":57.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/locknlube-front-view-coupler.jpg?v=1785826213","url":"https:\/\/northtrailauto.ca\/products\/locknlube-locking-grease-gun-coupler-1-8-npt-universal-rebuildable-10-000-psi-thumb-lever-release","provider":"North Trail Auto","version":"1.0","type":"link"}