{"product_id":"1104859200-4-inch-locking-diesel-fuel-cap-for-peterbilt-330-587-trucks-1972-2017","title":"1104859200 4 Inch Locking Diesel Fuel Cap for Peterbilt 330 587 Trucks 1972 2017","description":"\u003cstrong\u003eThis Locking Diesel Fuel Cap is a 4-inch locking fuel tank cap compatible with 1972-2017 Peterbilt trucks, including models 330 through 587, and matches OEM part number 11-04859-200.\u003c\/strong\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThis 4\" Locking Diesel Fuel Cap provides secure closure for saddle tanks on Peterbilt heavy-duty trucks, preventing fuel theft and contamination. The locking cap replaces lost or damaged caps and maintains tank pressurization to support proper fuel delivery. Built for owner-operators and fleet managers, this 4\" Locking Diesel Fuel Cap stops unauthorized access and moisture ingress.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e4-inch threaded diameter fits standard Peterbilt filler necks\u003c\/li\u003e\n\u003cli\u003eTumbler-style lock with two keys included for controlled access\u003c\/li\u003e\n\u003cli\u003eHeavy-duty die-cast metal body with corrosion-resistant black powder-coat finish\u003c\/li\u003e\n\u003cli\u003eBuilt-in vent prevents vacuum lock during fuel draw\u003c\/li\u003e\n\u003cli\u003eThick O-ring seal blocks water, dirt, and road debris\u003c\/li\u003e\n\u003cli\u003eDirect replacement for OEM part 11-04859-200\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1972-2017 Peterbilt trucks with 4-inch fuel tank opening\u003c\/li\u003e\n\u003cli\u003ePeterbilt 330, 335, 337, 340, 345, 348\u003c\/li\u003e\n\u003cli\u003ePeterbilt 357, 359, 362, 367, 372, 375, 377, 378, 379\u003c\/li\u003e\n\u003cli\u003ePeterbilt 384, 385, 386, 387, 388, 389, 548, 587\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Uses\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eReplacing broken or missing fuel caps on diesel saddle tanks\u003c\/li\u003e\n\u003cli\u003ePreventing fuel siphoning and theft at truck stops and overnight yards\u003c\/li\u003e\n\u003cli\u003eMaintaining tank pressurization to aid fuel pump delivery\u003c\/li\u003e\n\u003cli\u003eProtecting fuel from water contamination during wet weather\u003c\/li\u003e\n\u003cli\u003eRestoring proper fuel system operation after a cap is lost\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number(s):\u003c\/strong\u003e 11-04859-200\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCap Diameter:\u003c\/strong\u003e 4 inches (threaded)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Will this cap fit my Peterbilt 379 with a 4-inch filler neck? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, it is designed for all 1972-2017 Peterbilt models with a 4-inch tank opening, including the 379.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does the locking mechanism prevent fuel from spilling if the truck tips? \u003cstrong\u003eA:\u003c\/strong\u003e The cap provides a tight seal and includes a vent, but it is not a rollover vent; for full rollover protection, consult your tank manufacturer.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eProduct appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"DURAFORCE","offers":[{"title":"Default Title","offer_id":53679728525585,"sku":"ZZ3A00316","price":63.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/2446\/2929\/files\/57_240b4a19-c1df-4b44-88bc-963b71562774.jpg?v=1781654503","url":"https:\/\/www.duraforce.com\/products\/1104859200-4-inch-locking-diesel-fuel-cap-for-peterbilt-330-587-trucks-1972-2017","provider":"DURAFORCE","version":"1.0","type":"link"}