Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 61TM21-5PCT found under Resistor Thermal by Gulton Industries Inc. The National Stock Number assigned to this part is 5905009841785, 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 61TM21-5PCT.