Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TSC-4004 found under Electronic Components Assembly by Microsemi Frequency And Time. The National Stock Number assigned to this part is 5998015136804, and the Federal Supply Class is 5998 Electrical And Electronic Assemblies Boards Cards And Associated Hardware. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TSC-4004.