Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4E-239 found under Beam Structural by Hi Shear Corporation. The National Stock Number assigned to this part is 9540013536238, and the Federal Supply Class is 9540 Structural Shapes Nonferrous Base Metal. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4E-239.