Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5200D1 found under Tower by Tech Intl. The National Stock Number assigned to this part is 5445002126004, and the Federal Supply Class is 5445 Prefabricated Tower Structures. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 5200D1.