{"product_id":"rjsphh-greaseable-trailer-spring-bolts-9-16-x-3-14-piece-set-with-knurled-shoulder-grease-zerk","title":"RJSPHH greaseable trailer spring bolts 9\/16 x 3\" 14-piece set with knurled shoulder \u0026 grease zerk","description":"\u003cp\u003e\u003cstrong\u003eRJSPHH greaseable spring bolts are grease-zertailed, knurled-shoulder 9\/16\" x 3\" fasteners sold in a 14-piece set to lube and secure trailer leaf-spring connections.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese bolts are engineered to replace standard spring hanger or equalizer hardware on most common trailer axles (2000, 3500, 5200, 6000 and 7000 lb ratings). Each bolt features an M12-1.75 thread, a knurled shoulder that resists rotation in the hanger, and a factory-drilled passage with a grease zerk so you can inject lubricant without disassembly. The set includes lock nuts and a one-year warranty backed by RJSPHH customer support.\u003c\/p\u003e\n\n\u003ch3\u003eHow does a greaseable spring bolt improve trailer suspension maintenance?\u003c\/h3\u003e\n\u003cp\u003eGreaseable bolts let you add lubricant directly into the bolt shank so pivot points stay lubricated while installed. That reduces wear at the spring-eye interfaces and keeps movement smooth under load.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBuilt-in grease zerk for on-vehicle lubrication\u003c\/li\u003e\n  \u003cli\u003eMaintains grease film inside spring eyes and hangers\u003c\/li\u003e\n  \u003cli\u003eReduces need to remove bolts for periodic greasing\u003c\/li\u003e\n  \u003cli\u003eCompatible with common trailer grease guns\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these bolts fit my trailer's spring and hanger configuration?\u003c\/h3\u003e\n\u003cp\u003eEach bolt is 9\/16\" diameter with a 3\" length and M12-1.75 thread standard, matching many OEM and aftermarket hanger kits. The knurled shoulder is sized to press into hanger brackets so the bolt won’t spin when tightening the lock nut.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e9\/16\" (0.5625\") outside diameter — standard for many trailers\u003c\/li\u003e\n  \u003cli\u003eM12-1.75 thread pitch for common lock nuts\u003c\/li\u003e\n  \u003cli\u003eKnurled shoulder prevents rotational slip in hangers\u003c\/li\u003e\n  \u003cli\u003eUsed on 2000–7000 lb axle classes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install and use the RJSPHH greaseable spring bolts?\u003c\/h3\u003e\n\u003cp\u003eInstallation follows standard spring bolt procedures: align spring eye, slide the bolt through hanger or equalizer, seat the knurled shoulder, and tighten the included lock nut. After installation you can apply grease through the zerk to fill the bolt channel and lubricate the mating surfaces.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSlide bolt through spring eye and hanger bracket\u003c\/li\u003e\n  \u003cli\u003ePress knurled shoulder into bracket to stop bolt rotation\u003c\/li\u003e\n  \u003cli\u003eTighten supplied lock nut to spec (do not over-torque)\u003c\/li\u003e\n  \u003cli\u003eInject grease via zerk for on-vehicle lubrication\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and durability features should I expect?\u003c\/h3\u003e\n\u003cp\u003eThese bolts are machined for a snug fit and include a grease passage to prolong service life at pivot points. RJSPHH offers a one-year warranty and responsive customer support for any fit or quality questions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDurable construction suited to suspension wear points\u003c\/li\u003e\n  \u003cli\u003eGrease channel prevents dry contact inside spring eyes\u003c\/li\u003e\n  \u003cli\u003eIncluded lock nut secures the assembly against loosening\u003c\/li\u003e\n  \u003cli\u003e1-year RJSPHH warranty with 24-hour customer response\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? If you maintain utility trailers, boat trailers, horse trailers or small commercial trailers and want an easier, longer-lasting way to lubricate leaf-spring pivot points, this 14-piece RJSPHH greaseable bolt kit is designed for installers, fleet managers, and DIY trailer owners who prefer on-vehicle servicing and reduced downtime. The size and thread match many common axle classes, making the set a practical replacement kit for preventive maintenance and suspension refurbishing projects.\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: Are these bolts compatible with 3500 lb trailer axles?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The 9\/16\" diameter and M12-1.75 thread fit many 3500 lb trailer axle spring hangers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I grease the bolt without removing it?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The factory-installed grease zerk allows on-vehicle greasing using a standard grease gun.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"RJSPHH","offers":[{"title":"Default Title","offer_id":67587329261753,"sku":"B0BNGZ2J18","price":94.25,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/rjsphh-front-packaging-spring-bolts.jpg?v=1790506315","url":"https:\/\/redleafauto.ca\/products\/rjsphh-greaseable-trailer-spring-bolts-9-16-x-3-14-piece-set-with-knurled-shoulder-grease-zerk","provider":"Redleaf Auto","version":"1.0","type":"link"}