{"product_id":"atx21685-fuel-cap-t-chain-style","title":"T-Chain Style Fuel Cap 20770657 – Peterbilt Replacement – Alltrux ATX21685","description":"\u003cp data-start=\"1170\" data-end=\"1510\"\u003eThe Alltrux ATX21685 T-Chain Style Fuel Cap replaces OEM 20770657 and is designed as a direct replacement for Peterbilt heavy-duty truck fuel tank applications. Featuring a tethered T-chain design, this cap helps prevent loss during fueling while maintaining a secure seal that protects the fuel system from contamination and vapor leakage.\u003c\/p\u003e\n\u003cp data-start=\"1512\" data-end=\"1857\"\u003eFuel caps are critical components for maintaining fuel tank integrity by preventing dirt, moisture, and debris from entering the fuel supply. A properly sealing cap helps preserve fuel quality, supports consistent engine performance, and reduces the risk of contamination-related fuel system issues in demanding commercial trucking environments.\u003c\/p\u003e\n\u003cp data-start=\"1859\" data-end=\"2190\"\u003eEngineered for durability in fleet and vocational applications, this tethered fuel cap provides dependable sealing and convenience for drivers and maintenance personnel who require reliable, easy-to-use fuel tank hardware. Always verify filler neck size and application compatibility prior to installation to ensure proper fitment.\u003c\/p\u003e\n\u003ch2 data-start=\"2197\" data-end=\"2211\"\u003eKey Features\u003c\/h2\u003e\n\u003cp data-start=\"2212\" data-end=\"2525\"\u003eDirect replacement for OEM 20770657\u003cbr data-start=\"2247\" data-end=\"2250\"\u003eAlltrux Part Number: ATX21685\u003cbr data-start=\"2279\" data-end=\"2282\"\u003eT-chain tethered design to prevent cap loss during fueling\u003cbr data-start=\"2340\" data-end=\"2343\"\u003eHelps protect fuel system from contamination and debris\u003cbr data-start=\"2398\" data-end=\"2401\"\u003eProvides secure sealing for heavy-duty truck fuel tanks\u003cbr data-start=\"2456\" data-end=\"2459\"\u003eDesigned for Peterbilt and similar heavy-duty truck applications\u003c\/p\u003e\n\u003ch3 data-start=\"2532\" data-end=\"2558\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp data-start=\"2559\" data-end=\"2797\"\u003eBrand: Alltrux\u003cbr data-start=\"2573\" data-end=\"2576\"\u003ePart Number: ATX21685\u003cbr data-start=\"2597\" data-end=\"2600\"\u003eOEM Cross Reference: 20770657\u003cbr data-start=\"2629\" data-end=\"2632\"\u003eProduct Type: Fuel Cap (T-Chain Style)\u003cbr data-start=\"2670\" data-end=\"2673\"\u003eSystem: Fuel System\u003cbr data-start=\"2692\" data-end=\"2695\"\u003eCondition: New Aftermarket\u003cbr data-start=\"2721\" data-end=\"2724\"\u003eApplication: Heavy-Duty Truck Fuel Tanks (Peterbilt-style applications)\u003c\/p\u003e\n\u003ch4 data-start=\"2804\" data-end=\"2822\"\u003eCross References\u003c\/h4\u003e\n\u003cp data-start=\"2823\" data-end=\"2856\"\u003eOEM: 20770657\u003cbr data-start=\"2836\" data-end=\"2839\"\u003eALLTRUX: ATX21685\u003c\/p\u003e","brand":"JX Peterbilt","offers":[{"title":"Default Title","offer_id":44150916743348,"sku":"ATX21685","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/7425\/5540\/files\/ATX21685.jpg?v=1771763371","url":"https:\/\/parts.rodoc.com\/products\/atx21685-fuel-cap-t-chain-style","provider":"Rodoc Leasing Sales \u0026 Service ","version":"1.0","type":"link"}