Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PU12-4336 found under by Columbia Gear Corporation. The National Stock Number assigned to this part is 3020011089246, 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 PU12-4336.