Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4021-2016 found under Shielding Gasket Electronic by Kritech Corporation. The National Stock Number assigned to this part is 5999013515577, 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 4021-2016.