Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number QQN281 found under Bar Metal by Federal Specifications. The National Stock Number assigned to this part is 9530000817440, and the Federal Supply Class is 9530 Bars And Rods Nonferrous Base Metal. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like QQN281.