Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 25-000084-021 found under Screw Cap Socket by Farris M And Associates. The National Stock Number assigned to this part is 5305005986587, 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 25-000084-021.