Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S890S890A found under Screw Cap Hexagon H by The Dewey Electronics Corporation. The National Stock Number assigned to this part is 5305012232643, 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 S890S890A.