Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20C12-117 found under Setscrew by Eastman Machine Co. The National Stock Number assigned to this part is 5305015025980, 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 20C12-117.