Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 13D0021-034 found under Chain Fastener Angle by Boeing Aircraft. The National Stock Number assigned to this part is 4030013252632, 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 13D0021-034.