Standoff Insulators
No matter what you call them; Insulating Pillars, Standoff Insulators or Insulating Bobbins. We are proud to provide our extensively tested products to various sectors in many countries.
We manufacture in-house and hold excellent stock levels.
Below are access points for each of our products “footprints” alternatively head directly to our cross reference tool.

Our standoff insulators are available with both metric and imperial threads, and in a variety of heights and insert sizes.
- Self-extinguishing, UL 94 V-0 rated
- Halogen free
- Insulation voltage 1000 V AC, 1500 V DC
- Operating temperature range from −40 °C to +130 °C (−40 °F to +266 °F)
- UL Recognised Component; File Number: E505645
Selection Data
Our standoff insulators are available with either metric or imperial (UNC) threads, in a variety of product footprints, heights and insert sizes. Each product range has the same distinctive black octagonal design, making them the comprehensive choice for customers wishing to ensure uniformity within their assemblies.
Refer to the tables below or search our range by either required size, historic Termate product part numbers or competitor codes using our complete cross reference tool.
Metric
Footprint | Height [H] | Thread Size [M] | Width across flats [W] mm | Width across corners [X] mm | Base diameter [Y] mm | Shoulder height [Z] mm |
---|---|---|---|---|---|
AM1 | See full AM1 range | 18 | 20 | 15 | 4 |
AM2 | See full AM2 range | 25 | 27 | 22 | 6 |
AM4 | See full AM4 range | 35 | 38 | 30 | 10 |
AM6 | See full AM6 range | 60 | 65 | 53 | 22.5 |
Our metric insulators can be converted into Male/Male or Female/Male versions by fitting studs from our Grub Screw Pack.
Imperial
Footprint | Height [H] | Thread Size [M] | Width across flats [W] mm | Width across corners [X] mm | Base diameter [Y] mm | Shoulder height [Z] mm |
---|---|---|---|---|---|
AU2 | See full AU2 range | 1″ | 1⅛″ | ⅞″ | ¼″ |
AU4 | See full AU4 range | 1⅜″ | 1½″ | 1¼″ | ⅜″ |
AU6 | See full AU6 range | 2⅜″ | 2⁹⁄₁₆″ | 2⅛″ | ⅞″ |

UL Certified:
Our Standoff insulator range is a UL Recognised Component, more information can be found at UL Product IQ.
Manufacture:
Our insulators are made from glass-reinforced polyamide, chosen specifically for its mechanical capabilities and performance as an insulator.
Testing:
Our extensive testing procedure is designed to give you the confidence that, when correctly installed in your own assembly, our products will meet the specified ratings.
Each range has been subjected to cantilever, torque and tensile tests. Additionally they are compliant with the applicable clauses within many international standards Including those for low-voltage switchgear and controlgear assemblies, IEC 61439.
Contact us if you require compliance with other standards.
Application:
Termate insulators are commonly used in a variety of applications. They are designed to safely keep two conductive parts separated for safety reasons and to prevent contact between them that could cause damage or harm.
They are suitable for use in the manufacture of electric vehicles, battery energy storage systems, electrical panel boards and switchboards, as well as generators and drives.
Sectors:
Our standoffs are used across a variety of sectors, including power distribution, renewable energy (from wind, solar and tidal sources), the rail sector (both track side and rolling stock), in marine uses, temporary and emergency power, and also in datacentre power distribution.
Are you a panel builder? You may be interested in learning more about the 3 key properties for standoff insulators in low voltage switchgear and controlgear assemblies.
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