Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 7578484-021 found under Heat Sink Electrica by General Dynamics Land Systems Inc. The National Stock Number assigned to this part is 5999016473672, 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 7578484-021.