Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SM-C-974203 found under Shielding Gasket Electronic by Shielding Express Inc. The National Stock Number assigned to this part is 5999012188304, and the Federal Supply Class is 5999 Miscellaneous Electrical And Electronic Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SM-C-974203.