Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D0UBLE474 found under Chain Roller by Diamond Chain Co. The National Stock Number assigned to this part is 3020002527366, 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 D0UBLE474.