Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number FS2003-04-156C found under Screw Machine by M A Com Inc. The National Stock Number assigned to this part is 5305003167351, 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 FS2003-04-156C.