Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 12 001 21-427 found under Bolt Machine by Cc Jensen Inc. The National Stock Number assigned to this part is 5306014171206, 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 12 001 21-427.