Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NIH-403 6IP found under Screw Cap Socket He by Textron Fastening Systems. The National Stock Number assigned to this part is 5305015208400, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NIH-403 6IP.