Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 31640A1 found under Tab Assembly Trim by Brunswick Corporation. The National Stock Number assigned to this part is 2010011179161, and the Federal Supply Class is 2010 Ship And Boat Propulsion Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 31640A1.