Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number M1218SS X 1 2 KW found under Gear Sector Spur by Martin Sprocket And Gear Inc. The National Stock Number assigned to this part is 3020016652942, and the Federal Supply Class is 3020 Gear Pulley Sprocket And Transmission Chain. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like M1218SS X 1 2 KW.