Please measure the diameter of your current fuel cap or fuel tank fill tube prior to ordering. One 3 1/2” 8 TPI NPSL, non-locking, aluminum, diesel fuel cap. Female fitting, vented, for diesel application only. Includes rubber gasket seal, safety chain, and bail. Approximate dimensions = Across threads cap 3 7/16”, Across threads filler neck 3 1/2” Approximate net weight = 9 oz *Replaces Freightliner A03-15682-6 and Western Star 43301-3403 *Fits select Kenworth, Freightliners after 1983 * Fits select Western Star after 1982 * Fits other select models of trucks