Threaded Cartridge Heater

Threaded Cartridge Heater

Threaded Cartridge Heater is a screw-in heating element designed for applications where a threaded connection is preferred over a press-fit installation.
With an integrated BSP thread, the heater can be directly screwed into equipment for convenient installation, removal and replacement.

Our standard threaded cartridge heaters use a SUS321 stainless steel sheath, BSP thread and 220V power supply.
Common 1/4″, 3/8″ and 1/2″ BSP models are available in stock. NPT threads, built-in thermocouples, special thread sizes and other configurations are available for custom production.

Screw-in Threaded Design

• Screw-in Installation: Threaded connection allows direct installation into a threaded equipment port.
• BSP Thread: 1/4″, 3/8″ and 1/2″ BSP stock configurations.
• Easy Replacement: Threaded mounting allows convenient heater removal and replacement.
• Non-heating Thread Section: The threaded section is designed as a non-heating zone. Only the heater tube below the thread generates heat.
• Custom Threads: NPT and special thread dimensions are available for custom orders.

Product Specifications

Item	Specification
Product Type	Threaded Cartridge Heater
Sheath Material	SUS321; SUS316L / Inconel 600 available for custom orders
Thread Standard	1/4″ BSP, 3/8″ BSP and 1/2″ BSP standard; NPT custom-made
Heater Diameter	Φ12.5mm, Φ16.5mm and Φ21mm for stock models
Insulation Material	High-purity compacted Magnesium Oxide (MgO)
Standard Voltage	220V
Custom Voltage	12V / 24V / 110V / 380V and other voltages
Watt Density	7–11 W/cm²
Power Tolerance	-10% ~ +5%
Maximum Working Temperature	Up to 550°C depending on construction and operating conditions
Default Lead Wire	300mm high-temperature fiberglass wire
Built-in Thermocouple	Custom-made only

Stock Threaded Cartridge Heater Sizes

The following Threaded Cartridge Heater models are available as standard stock sizes.
All stock models use a BSP thread, SUS321 sheath and 220V power supply.

Custom Threaded Cartridge Heater

In addition to standard BSP models, we manufacture custom Threaded Cartridge Heaters according to customer drawings, samples or application requirements.

• Custom NPT or other thread standards
• Custom thread diameter and thread length
• Custom heater diameter
• Custom heated length and overall length
• Custom voltage and power
• Custom watt density
• Built-in K-type or J-type thermocouple
• SUS321 / SUS316L / Inconel 600 sheath options
• Custom lead-wire length and configuration
• L-shape and other special lead-out configurations

Applications

• Liquid heating tanks and small water heating vessels
• Small oil tanks and process liquid heating equipment
• Hot melt machines and glue dispensing equipment
• Packaging and sealing machinery
• Small chemical reactors and process vessels
• Air heating chambers and duct heating modules
• Equipment requiring screw-in heater installation
• Industrial equipment requiring convenient heater replacement

Installation & Safety Notes

• The threaded section is a non-heating zone. Only the heater tube below the thread generates heat.
• For liquid heating applications, make sure the heated section is properly immersed according to the equipment design.
• Dry operation can cause excessive temperature rise and premature heater failure.
• Make sure the thread is correctly matched with the equipment port before installation.
• Do not overtighten the threaded connection, as excessive mechanical force may damage the heater.
• Built-in thermocouple versions require correct connection of the heating and sensor wires.

FAQ

Q: What thread types are available?

A: Standard stock models use 1/4″, 3/8″ and 1/2″ BSP threads. NPT and other thread standards can be manufactured as custom orders.

Q: Is the threaded section heated?

A: No. The thread section is designed as a non-heating zone. The heating output is generated by the heater tube below the threaded section.

Q: Can the heater be customized?

A: Yes. We can customize the thread type, diameter, heated length, voltage, power, watt density, sheath material, lead wire and thermocouple configuration.

Q: Do you have threaded cartridge heaters in stock?

A: Yes. Selected BSP models in 220V specifications are available as stock sizes. Please contact us for current stock availability.

Related Cartridge Heater Products

For other cartridge heater configurations, you can also view our
Standard Cartridge Heater,
High-Density Cartridge Heater,
Miniature / Micro Cartridge Heater,
L-Shape Cartridge Heater,
Cartridge Heater with Built-in Thermocouple
and
Flange-Mount Cartridge Heater.

Contact Us for a Threaded Cartridge Heater

Need a stock model or custom Threaded Cartridge Heater?
Contact our sales team for pricing, availability and OEM production.
Please provide your required thread size, heater diameter, heated length, voltage, power and quantity.

Stock sizes available. Custom threaded cartridge heaters supported.