M3 threaded 100K high-temperature thermistor for hotend heater blocks. This Trianglelab screw-in sensor uses an ATC Semitec 104NT-4-R025H42G NTC element in an M3/M4-style metal package for V6/Volcano-class 3D printer hotends that need a secured thermistor instead of a loose glass bead. Why use a threaded thermistor Positive retention: the metal threaded body fastens into a compatible heater block so the sensor is less likely to walk out during service or wire movement. High-temperature 100K curve: Trianglelab documents the 104GT-2 / 104NT-4-R025H42G thermistor for heater-block use up to 280°C; the ATC Semitec NT-4 glass thermistor family is rated for -50°C to 300°C. Firmware-friendly: use the ATC Semitec 104NT-4-R025H42G / 104GT-2 profile; in Klipper that is sensor_type: ATC Semitec 104NT-4-R025H42G. Specifications Sensor type: ATC Semitec 104NT-4-R025H42G NTC thermistor Resistance: 100 kΩ at 25°C B value: 4267 K, 25/85°C, ±2% Resistance tolerance: ±3% Mounting: M3 threaded metal hotend sensor body; Trianglelab lists M3/M4-compatible sets Lead set: white high-temperature leads with crimp terminals and housing shown Common fit: compatible heater blocks that accept an M3 threaded thermistor, including many V6/Volcano-style hotend blocks Fitment and setup notes Pair it with a heater cartridge such as the 24V 40W heater cartridge, slim 24V 40W heater cartridge, or 24V 50W 2m heater cartridge when rebuilding a hotend. For higher-temperature builds above this thermistor's documented range, use a PT100/PT1000-style sensor instead; we also carry a PT1000 temperature sensor. Do not install this into a block that expects a smooth 3 mm cartridge sensor or a different thread size. Confirm the heater-block sensor bore before ordering.
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