Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6437741-00 found under Gear Spur by Duffnorton Co Inc. The National Stock Number assigned to this part is 3020012215699, 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 6437741-00.