Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E21A80-2STSC found under Gear Spur by Designatronics Incorporated. The National Stock Number assigned to this part is 3020004184835, 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 E21A80-2STSC.