Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 500198A found under Beam Structural by Clamshell Structures Inc. The National Stock Number assigned to this part is 9520014640160, 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 500198A.