Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number QQB571ANDTYPEB2ANDCLASSC found under Bolt Machine by Federal Specifications. The National Stock Number assigned to this part is 5306002822255, 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 QQB571ANDTYPEB2ANDCLASSC.