Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MB501230 found under Filter Fluid by 2Mb International. The National Stock Number assigned to this part is 2940014699040, 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 MB501230.