Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1771-AF found under Modem Fiber Optic by Allen Bradley Co. The National Stock Number assigned to this part is 6030013903278, and the Federal Supply Class is 6030 Fiber Optic Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1771-AF.