Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AS4-D M8X50 found under Bolt Machine by Stauff Corp. The National Stock Number assigned to this part is 5306015506727, 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 AS4-D M8X50.