Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number VCD-23 16X6IN ML4302 AE-249 found under Damper Ventilation by Greenheck Fan Corp. The National Stock Number assigned to this part is 4140015375760, 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 VCD-23 16X6IN ML4302 AE-249.