Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number UP-221 found under Cylinder Assembly Actuating Line by Integrated Distribution Systems. The National Stock Number assigned to this part is 3040012185216, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like UP-221.