Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DXL 18-8.5 W 4P found under Cooler Fluid Industrial by Condex Heat Transfer Corp. The National Stock Number assigned to this part is 4420013721808, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like DXL 18-8.5 W 4P.