Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S55-1000446 found under Resistorthermal by Watlow Electric Manufacturing. The National Stock Number assigned to this part is 5905016876171, and the Federal Supply Class is 5905 Resistors. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S55-1000446.