Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 159 31856 1 found under Windshield Panel Ai by Smith And Smith Aircraft Co. The National Stock Number assigned to this part is 1560001887515, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 159 31856 1.