Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BA90543-7 found under Nonmetallic Channel by American Telephone And Telegraph Co. The National Stock Number assigned to this part is 9390001715092, and the Federal Supply Class is 9390 Miscellaneous Fabricated Nonmetallic Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BA90543-7.