Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SM-D-656589 found under Shielding Gasket Electronic by Metex Corporation. The National Stock Number assigned to this part is 5999002442740, 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-D-656589.