Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 10J21-550 found under Flange Duct Assembl by Eaton Corporation. The National Stock Number assigned to this part is 1560013102480, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 10J21-550.