Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4-27748P found under Coupler Optoelectronic by Selex Es Ltd. The National Stock Number assigned to this part is 5980002031342, and the Federal Supply Class is 5980 Optoelectrical Devices And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4-27748P.