Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S12S-010 ITEM 87 found under Gear Drive Motion by Wysong And Miles Company. The National Stock Number assigned to this part is 3020011907100, 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 S12S-010 ITEM 87.