Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number QQT570CLASSS5 found under Bar Metal by Federal Specifications. The National Stock Number assigned to this part is 9510005968950, and the Federal Supply Class is 9510 Bars And Rods. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like QQT570CLASSS5.