Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 642TYPETU2PASS found under Heater Water Steam Hot Water Hea by Xchanger Manufacturing Corporation. The National Stock Number assigned to this part is 4410011980637, 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 642TYPETU2PASS.