Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CA12020-1B found under Bolt Internal Wrenc by Alcoa Global Fasteners Inc. The National Stock Number assigned to this part is 5306013084800, 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 CA12020-1B.