Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 121048-1-203 found under Channel Structural by Aero Hardware And Supply Inc. The National Stock Number assigned to this part is 9520015383805, 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 121048-1-203.