Locking Diesel Fuel Gas Cap With 2 Keys | 3.5" Female Thread Fitting 5.5 TPI Vented Semi Truck | Fit for Freightliner Kenworth Peterbilt Western Star | OE# 572.1036, SNV431089 (2 Sets) Item Description About this item OEM number: 572.1036 | SNV431089 | Package includes: 2 X Fuel Tank Locking Gas Cap with 2 Keys The semi truck gas cap (female thread fitting) is suitable for diesel fuel tanks with 3 1/2" male pipe filler neck, suitable for fuel tank ports with special thread TPI 5.5. Please measure the diameter of your fuel tank fill tube prior to ordering. Prevent Diesel Leaks: This fuel tank cap is for use with semi-trailer diesel fuel tanks only. This is a vented gas cap. The fuel tank cap is equipped with a rubber sealing ring, so there will be no leakage after installation. Anti-theft Fuel Tank Cap: This fuel tank cap is designed with a lock, high-quality lock cylinder and two matching keys to prevent diesel theft. 12.25" safety chain and lifting ring to prevent the tank cap from being lost when refueling. Easy to Replace: Please clean the threaded part when installing, and please cover the fuel tank port to prevent impurities from entering the fuel tank. Tighten the fuel tank cap after thorough cleaning to prevent leakage. Compatible with: Freightliner before 1984 | Kenworth after 1984 | Peterbilt before 1980 | Western Star before 1983 | ? See more product details ONE YEAR WARRANTY 100% BRAND NEW AND HIGH QUALITY Notes: No instruction included, professional installation is highly recommended! Please make sure that the product is compatible with your vehicle. Payment We accept payment only through PAYPAL Shipping We ship products worldwide through standard express courier service, it will reach within 7 to 10 days to abroad buyers, we ship the product after recieved clear payment and give full information about shipment to the buyer Return We accept product return 25 days from delivery date but product should be in original condition.