Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21081 found under Bolt Externally Relieved Body by Lucas Aerospace Power Equipment. The National Stock Number assigned to this part is 5306004964640, and the Federal Supply Class is 5306 Bolts. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 21081.