Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 100272-001 found under Resistor Thermal by Efratom Time And Frequency Products. The National Stock Number assigned to this part is 5905013743385, 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 100272-001.