Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 505C3-223 found under Base Plate Body by Eastman Machine Co. The National Stock Number assigned to this part is 2540015026335, and the Federal Supply Class is 2540 Vehicular Furniture And Accessories. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 505C3-223.