Pillar Insulators

Our pillar insulator range is designed to provide exceptional electrical insulation and mechanical support in a wide range of applications, including those where high fire retardancy and low smoke emissions are required. 

Photograph of Termate's range of pillar insulators, with female/female threads, and male/female and male/male studs

Made from specialised polyamide, selected to meet NF F16- 101/102 requirements, our pillar insulators offers high mechanical and insulating capabilities while simultaneously ensuring burning and smoke toxicity standards are met.

  • Halogen and phosphorus free
  • Burning behaviour I rating: I3
  • Smoke and toxicity F rating: F2

Technical Data

Female/Female Pillar Insulators

Part Number3D ModelHeight [H] (mm)Width AF [W] (mm)Width AC [X] (mm)Thread Size [M]*Thread Depth [D] (mm)Box Qty.
3M420F3M420F STEP file201214M45200
3M520F3M520F STEP file201214M55200
3M425F3M425F STEP file251214M45200
3M525F3M525F STEP file251214M55200
3M430F3M430F STEP file301214M45200
3M530F3M530F STEP file301214M55200
3M540F3M540F STEP file401214M55100
3M550F3M550F STEP file501214M55100
3M560F3M560F STEP file601214M55100

Male/Female Pillar Insulators

Part Number3D ModelHeight [H] (mm)Width AF [W] (mm)Width AC [X] (mm)Thread Size [M]*Thread Depth [D] (mm)Length [L] (mm)Box Qty.
3M415H3M415H STEP file151214M4516200
3M515H3M515H STEP file151214M5514200
3M420H3M420H STEP file201214M4516200
3M520H3M520H STEP file201214M5514200
3M525H3M525H STEP file251214M5514200
3M430H3M430H STEP file301214M4516200
3M530H3M530H STEP file301214M5514200
3M540H3M540H STEP file401214M5514100
3M550H3M550H STEP file501214M5514100
3M560H3M560H STEP file601214M5514100

Male/Male Pillar Insulators

Part Number3D ModelHeight [H] (mm)Width AF [W] (mm)Width AC [X] (mm)Thread Size [M]*Length [L] (mm)Box Qty.
3M415M3M415M STEP file151214M416200
3M515M3M515M STEP file151214M514200
3M420M3M420M STEP file201214M416200
3M520M3M520M STEP file201214M514200
3M525M3M525M STEP file251214M514200
3M430M3M430M STEP file301214M416200
3M530M3M530M STEP file301214M514200
3M540M3M540M STEP file401214M514100

* Fixing details: Hole diameter = Standoff thread size [M]+1 mm. e.g. M6 Thread = 7 mm hole diameter.



Zero halogen and phosphorus free polyamide 6 (PA6) with low smoke emissions and flame retardant

Female Insert Material


Male Insert Material

Mild Steel, Zinc Plated & Passivated

Operating Temperature

−20 °C to +130 °C


V-0, to IEC 60695-11-10

NF F Classification

16-101/102, I3, F2

Oxygen Index


Glow Wire

960 °C


Equipment Voltage, Ue
1000 V AC, 1500 V DC
Insulation Voltage, Ui
1000 V AC, 1500 V DC
Impulse Voltage, Uimp
12 kV


Our Pillar Insulators are made from halogen and phosphorus free Polyamide 6 (PA6) with low smoke emissions and flame retardant. This material has been independently tested and complies with the NF F16 101/102 requirements as stated. Unlike with porcelain or DMC (dough moulded compound) insulators, this material choice allows our standoffs to be injection moulded, which facilitates increased accuracy compared to compression moulded or resin cast alternatives.


As with all Termate products, our Pillar Insulators have been subjected to expert testing in order to ensure suitability for their intended application. Each range is fully compliant with the applicable clauses within the international standard for low-voltage switchgear and controlgear assemblies, IEC 61439.

We can review compliance with other standards upon request. In addition, the material for this range has been subjected to specific testing for reaction to fire, opacity of smoke and toxicity of gases emitted.

Our testing procedure is designed to give you the confidence that, when correctly installed in your own assembly, our products will meet the specified ratings.


Our Pillar Insulators are designed to provide insulated support in assemblies that include live conductors, maintaining the distance between two surfaces to ensure they do not touch.

Additionally, our Pillars are optimised to meet specific demands on flammability and release of particulates during a fire. They are suitable for use in;

  • electronics and motors,
  • underground rail rolling stock,
  • tunnels,
  • marine,
  • mining and oil and gas applications

It is essential that you ensure our range is fully compliant with your specific requirements prior to use; our highly experienced team are available to provide more technical details and advise on product use.