Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21285-00191 found under Insert Screw Thread by Selex Es Ltd. The National Stock Number assigned to this part is 5325002913495, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 21285-00191.