Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 28280 found under 50Flange Wall Moun by Hollaender Manufacturing Co The. The National Stock Number assigned to this part is 5340015614594, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 28280.