Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number XLP77 2550 found under Filter Element Inta by Donaldson Co Inc. The National Stock Number assigned to this part is 2940013793771, 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 XLP77 2550.