Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B18 24 2004 found under Screw Cap Socket Head by American Society Of Mechanical. The National Stock Number assigned to this part is 5305016709184, 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 B18 24 2004.