{"product_id":"ralzaoto-trailer-oil-bath-dust-caps-for-dexter-6k-8k-axles-2-7-8-threaded-polycarbonate-pack-of-4-corrosion-resistant","title":"RALZAOTO Trailer Oil Bath Dust Caps for Dexter 6K-8K Axles, 2-7\/8\" Threaded Polycarbonate Pack of 4 — Corrosion-Resistant","description":"\u003cp\u003e\u003cstrong\u003eThese RALZAOTO oil bath dust caps are 2-7\/8\" threaded replacement covers designed to fit Dexter 6K–8K (and some 9K) oil bath drums—sold as a 4-piece set that replaces part K71-038-00 and Dexter 21-35 \/ 23-29 caps.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf you maintain trailers with Dexter oil-bath axles, keeping the hub opening sealed against grime and moisture is critical. These caps are molded from durable polycarbonate to resist corrosion, discoloration and cracking, and they thread onto 2.75\" (2-7\/8\" OD) hubs with 12 threads to restore a proper dust seal. They are intended for common Dexter drum numbers cast into the drum face such as 8-218, 8-219, 8-232, 8-285 and 8-286, and work on many 6,000–8,000 lb axles and some older 9,000 lb drums dating to around Oct 1, 1989 and earlier.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I know these caps will fit my Dexter drum?\u003c\/h3\u003e\n\u003cp\u003eCheck the drum casting and thread size before ordering. The easiest verification is a visual match to the drum number and confirming a 2-7\/8\" threaded outside diameter with a 12-thread pattern.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLook for cast numbers: 8-218, 8-219, 8-232, 8-285, 8-286\u003c\/li\u003e\n  \u003cli\u003eReplaces Dexter part numbers 21-35 and 23-29 and K71-038-00\u003c\/li\u003e\n  \u003cli\u003eDesigned for 2-7\/8\" OD threads, 12 threads per inch\u003c\/li\u003e\n  \u003cli\u003eCommon on 6000–8000 lb axles; fits some 9000 lb drums made before Oct 1989\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat materials and durability can I expect from these replacement caps?\u003c\/h3\u003e\n\u003cp\u003eRALZAOTO caps are produced in high-strength polycarbonate for long service life in harsh trailer environments. The material offers resistance to rust, oxidation and UV-related discoloration compared with metal caps, while remaining dimensionally stable under heat and vibration.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePremium polycarbonate construction resists cracking and corrosion\u003c\/li\u003e\n  \u003cli\u003eColor-stable under sun exposure; won’t flake like painted metal\u003c\/li\u003e\n  \u003cli\u003eLightweight yet strong—minimizes wear on threads and fittings\u003c\/li\u003e\n  \u003cli\u003ePack of 4 makes it easy to service multiple hubs at once\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow straightforward is installation and maintenance?\u003c\/h3\u003e\n\u003cp\u003eInstallation is simple and tool-free in most cases: remove the old cap and hand-thread the new one until snug. Periodic inspection for tightness and checking for contamination inside the hub keeps bearings and oil bath systems performing properly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHand-screw on by aligning threads and turning until seated\u003c\/li\u003e\n  \u003cli\u003eNo special tools required; swap takes only minutes per hub\u003c\/li\u003e\n  \u003cli\u003eInspect annually or after heavy off-road use for seals and oil level\u003c\/li\u003e\n  \u003cli\u003eKeep spare caps on hand to replace damaged or lost units quickly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat exact parts and quantities are included in this listing?\u003c\/h3\u003e\n\u003cp\u003eThe package contains four RALZAOTO oil bath dust caps engineered to replace Dexter part K71-038-00 and compatible Dexter 21-35 \/ 23-29 style caps. Each cap is sized for 2-7\/8\" thread OD and fits drums with the listed casting numbers.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eQuantity: 4 dust caps per pack\u003c\/li\u003e\n  \u003cli\u003eThread size: 2-7\/8\" OD, 12 threads\u003c\/li\u003e\n  \u003cli\u003eReplaces part numbers K71-038-00, Dexter 21-35, 23-29\u003c\/li\u003e\n  \u003cli\u003eCompatible with drums 8-218, 8-219, 8-232, 8-285, 8-286\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: These RALZAOTO oil bath dust caps are for trailer owners, fleet managers and DIY mechanics who service Dexter oil-bath axles on utility, boat, car hauler and larger recreational trailers. If your drums show the listed casting numbers or you need a direct replacement for Dexter 21-35 \/ 23-29 style caps, this 4-piece set provides a durable, easy-to-install option to protect bearings and oil systems from contamination.\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: Will these caps fit my Dexter 8-219 drum?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes—these RALZAOTO caps are compatible with 8-219 drums that use a 2-7\/8\" OD, 12-thread oil cap (replaces Dexter 23-29\/21-35).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are tools required to install the caps?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No—installation is typically hand-threaded; remove the old cap and screw the new cap on until snug.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"RALZAOTO","offers":[{"title":"Default Title","offer_id":48085632549022,"sku":"B0DT9Q6Q1R","price":46.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/ralzaoto-front-packaging-oil-cap.jpg?v=1785875632","url":"https:\/\/northtrailauto.ca\/products\/ralzaoto-trailer-oil-bath-dust-caps-for-dexter-6k-8k-axles-2-7-8-threaded-polycarbonate-pack-of-4-corrosion-resistant","provider":"North Trail Auto","version":"1.0","type":"link"}