Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B1831DH060020D found under Screw Cap Socket He by Alliant Techsystems Operations Llc. The National Stock Number assigned to this part is 5305015397763, 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 B1831DH060020D.