Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number QQ-S-741 found under Beam Structural by Federal Specifications. The National Stock Number assigned to this part is 9520005961890, and the Federal Supply Class is 9520 Structural Shapes. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like QQ-S-741.