Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B6031 found under Impeller Fan Axial by Howell Electric Motors. The National Stock Number assigned to this part is 4140006350887, and the Federal Supply Class is 4140 Fans Air Circulators And Blower Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B6031.