Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 8201-004-020 found under Setscrew by Cs Controls Incorporated. The National Stock Number assigned to this part is 5305014518276, 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 8201-004-020.