Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D1239 found under Cooler Air by Xchanger Manufacturing Corporation. The National Stock Number assigned to this part is 2990013292234, and the Federal Supply Class is 2990 Miscellaneous Engine Accessories Nonaircraft. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D1239.