Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 663D1-75-80 found under Insert Fastener by Alcoa Fastening Systems Ltd. The National Stock Number assigned to this part is 5342001227297, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 663D1-75-80.