Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R63870B11E8322 found under Chain Assembly Single Leg by Unifab Industries Inc. The National Stock Number assigned to this part is 4010001065657, and the Federal Supply Class is 4010 Chain And Wire Rope. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like R63870B11E8322.