2pcs Locking Diesel Fuel Cap Compatible with Freightliner Kenworth Western Star Fuel Caps,3 1/2" Course Thread 5.5 TPI Vented Semi Truck Fuel Tank Cap with 4 Keys

【COMPATIBILITY】The locking diesel fuel cap for Freightliner before 1984,for Kenworth after 1984,for Peterbilt before 1980, for Western Star before 1983.Replacement part number 572.1036, SNV431089, K071-385-1234. 【HIGH QUALITY MATERIAL】 The fuel tank cover is made of high-quality aluminum alloy, which has the advantages of corrosion resistance, oxidation resistance, and longer service life; There are high-quality lock cylinders and 4 matching keys to ensure that diesel oil will not be stolen,Safety chain and crossbar are standard. 【PROFESSIONAL REPLACEMENT PART】Provides a tight seal to keep your vehicle's fuel tank closed, safety your vehicle's occupants, fuel economy and reduce vapor emissions. The fuel cap is equipped with a rubber sealing ring , to ensure no leakage. 【EASY TO REPLACE】100% New and ready to install straight out of the box. You might be able to fix your gas cap problem without visiting your local auto shop, saving both time and money. 【NOMINAL SIZE】3 1/2" Nominal Size, 5 1/2 Threads/Inch For diesel applications only,Please measure the diameter of your current fuel cap or fuel tank fill tube prior to ordering.This product comes with a blue protective film, peel off the film before use,Also if you have any other questions on our this locking gas cap, please contact us at the first time.