Semitec 104GT-2 NTC Thermistor with M3 thread. Replacement thermistor for heater blocks with a M3 thread. Thermistor leads terminate with a 2 pin JST connector. 

Can also be used to Replace Glass Bead type Thermistors (no Air pocket) for more Accurate reading

Specifications:

• Thermistor Type: NTC
• Resistance: 100k
• Maximum Temp: 300C
• Tolerance: 3%
• Marlin Firmware Configuration: TEMP_SENSOR_N 5