Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MIL-H22663T-NM1000WT440VL60CY-AC found under Heater Space Electric by Valad Electric Heating Corp. The National Stock Number assigned to this part is 4520000365934, 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 MIL-H22663T-NM1000WT440VL60CY-AC.