Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PR3404-1PIECE121 found under Gear Cluster by The Electric Tachometer Corp. The National Stock Number assigned to this part is 3020011228281, 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 PR3404-1PIECE121.