{"product_id":"4-way-flat-trailer-plug-dust-cap-rubber-boot-safety-loop","title":"4-Way Flat Trailer Plug Dust Cap – Rubber Boot with Safety Loop for RV Truck Boat","description":"\u003ch2\u003e4-Way Flat Trailer Plug Dust Cap — Weatherproof Rubber Boot with Safety Loop\u003c\/h2\u003e\u003cp\u003eEvery time you disconnect your trailer, the 4-way flat plug is exposed to road grime, moisture, and corrosion. A single season of neglect can oxidize the contacts enough to cause intermittent brake light or turn signal failures — a serious safety and compliance issue. This rubber dust cap seals the connector completely when not in use, extending contact life and keeping your trailer wiring inspection-ready.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNatural rubber (weather and UV resistant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e13.5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Cover Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3.5 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnector Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-way flat (SAE J1239 standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSafety Loop\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIncluded — tethers cap to harness to prevent loss\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRV, travel trailer, boat trailer, utility trailer, truck hitch wiring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull contact seal:\u003c\/strong\u003e Rubber boot conforms to the 4-way flat plug profile, blocking moisture, mud, and road salt from reaching the terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety tether loop:\u003c\/strong\u003e Prevents the cap from being lost when disconnected — stays attached to the harness at all times\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUV and ozone resistant rubber:\u003c\/strong\u003e Maintains flexibility and sealing performance across temperature extremes from -30°C to +80°C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSAE J1239 compatible:\u003c\/strong\u003e Fits the standard 4-way flat connector used on the vast majority of North American trailers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: Will this fit a 4-pin flat connector on a boat trailer?\u003c\/strong\u003e\u003cbr\u003eA: Yes. This cap is designed for the standard 4-way flat (4-pin) connector used on boat trailers, utility trailers, and most light-duty tow applications in North America and Australia.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Does the safety loop attach to the trailer or the vehicle?\u003c\/strong\u003e\u003cbr\u003eA: The loop is designed to be zip-tied or hooked to the trailer-side wiring harness, so the cap stays with the trailer when you disconnect. This prevents the cap from being left behind at the hitch.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Is this compatible with 5-way or 7-way connectors?\u003c\/strong\u003e\u003cbr\u003eA: No. This cap is sized specifically for the 4-way flat connector. For 5-way flat or 7-way round connectors, a different cap size is required.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: How do I clean corroded 4-way flat contacts before fitting this cap?\u003c\/strong\u003e\u003cbr\u003eA: Use electrical contact cleaner spray and a small wire brush to remove oxidation, then apply dielectric grease to the contacts before fitting the cap. This prevents future corrosion buildup.\u003c\/p\u003e\u003ch3\u003ePackage Contents\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e1×, 2×, or 4× rubber dust cap with safety loop (select quantity above)\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003e\u003cem\u003eProtect your trailer wiring investment — one cap prevents hundreds in corrosion-related repair costs.\u003c\/em\u003e\u003c\/p\u003e","brand":"Cable Parts Online","offers":[{"title":"1pc","offer_id":47854482096373,"sku":"14:202642826#1pc","price":12.24,"currency_code":"USD","in_stock":true},{"title":"2pcs","offer_id":47854482129141,"sku":"14:200004889#2pcs","price":22.56,"currency_code":"USD","in_stock":true},{"title":"4pcs","offer_id":47854482161909,"sku":"14:200004890#4pcs","price":42.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3494\/0149\/files\/S84f7b3c72c7f4cb688d621bc79590d39R.webp?v=1773976933","url":"https:\/\/www.csldmcml.com\/products\/4-way-flat-trailer-plug-dust-cap-rubber-boot-safety-loop","provider":"Cable Parts Online","version":"1.0","type":"link"}