Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number OC40 found under Filter Element Flui by Mahle Aftermarket Gmbh. The National Stock Number assigned to this part is 2940121867181, and the Federal Supply Class is 2940 Engine Air And Oil Filters Strainers And Cleaners Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like OC40.