Reefer Trailer, International 4300 4400 MD Semi Trucks and Ford 650/750. Replace# FTA-C02 FTA-N-04 FTA-N6-16 FTA-N-73. Why you change this locking diesel fuel cap?. l 【 NEEDS】 If you are worried that your diesel may suddenly disappear or have experienced cross contamination caused by the cap falling off, Simply add the anti-theft fuel gas cap to protect your fuel tank and eliminate any worries.