Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 21797 found under Keytop Panel Data Entry Keyboard by Ciba Corning Diagnostics Corp. The National Stock Number assigned to this part is 7025012612871, and the Federal Supply Class is 7025 Adp Input Output And Storage Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 21797.