Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 63-1140 found under Washer Landing Gear by Boeing Aircraft. The National Stock Number assigned to this part is 1620008350025, and the Federal Supply Class is 1620 Aircraft Landing Gear Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 63-1140.