Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 05-10021 found under Chain Fastener Angle by Spokane Industries Inc. The National Stock Number assigned to this part is 4030013947299, and the Federal Supply Class is 4030 Fittings For Rope Cable And Chain. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 05-10021.