Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 803-5002990-75 found under Contact Assembly El by Electro Switch Corp. The National Stock Number assigned to this part is 5999012503187, 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 803-5002990-75.