Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A9 143 found under Guard Fan Impeller by C E Niehoff And Co. The National Stock Number assigned to this part is 6115016088720, and the Federal Supply Class is 6115 Generators And Generator Sets Electrical. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A9 143.