Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 31TD43 found under Resistor Thermal by Piezothermx Corporation. The National Stock Number assigned to this part is 5905003278849, 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 31TD43.