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RAM4 – 35 mm A/F

Technical Data

For smaller sizes click here

For larger sizes click here

Part number3D ModelHeight
[H] (mm)
Thread Size*
Thread Depth
[D] (mm)
Tightening Torque
Tensile Strength**
Cantilever Strength**
Box Qty.
RAM4-030-06RAM4-030-06 STEP file30M67119840448060
RAM4-030-08RAM4-030-08 STEP file30M892812400651060
RAM4-035-06RAM4-035-06 STEP file35M67119840420060
RAM4-035-08RAM4-035-08 STEP file35M892812720616060
RAM4-035-10RAM4-035-10 STEP file35M10105515200868060
RAM4-040-06RAM4-040-06 STEP file40M67119760385050
RAM4-040-08RAM4-040-08 STEP file40M8112813040588050
RAM4-040-10RAM4-040-10 STEP file40M10105515600826050
RAM4-045-06RAM4-045-06 STEP file45M67119760350050
RAM4-045-08RAM4-045-08 STEP file45M8112813360553050
RAM4-045-10RAM4-045-10 STEP file45M10165516000784050
RAM4-050-06RAM4-050-06 STEP file50M67119760322025
RAM4-050-08RAM4-050-08 STEP file50M8112813680518025
RAM4-050-10RAM4-050-10 STEP file50M10165516400742025
RAM4-050-12RAM4-050-12 STEP file50M12169521280980025
RAM4-060-08RAM4-060-08 STEP file60M8112814320455025
RAM4-060-10RAM4-060-10 STEP file60M10165517120665025
RAM4-060-10-12RAM4-060-10-12 STEP file60M10 + M12165517120665025
RAM4-060-12RAM4-060-12 STEP file60M12169521680798025

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

** Tensile and Cantilever Strength figures are based on tests carried out at normal room temperature, nominal 23 °C.

Our metric insulators can be converted into Male/Male or Female/Male versions by fitting studs from our Grub Screw Pack.



Glass Reinforced Polyamide 6.6

Insert Material


Operating Temperature

−20 °C to +130 °(−4 °F to +266 °F)

Flammability (UL 94 & IEC 60695-11-10)


Oxygen Index (EN ISO 4589-2)


Glow Wire (EN IEC 60695-2-12)

960 °C

CTI (EN IEC 60112-2020)

600  V

Smoke Emission (EN ISO 5659-2: 25 kWm-2)

Ds max =135


Equipment Voltage, Ue

1000 V AC, 1500 V DC

Insulation Voltage, Ui

1000 V AC, 1500 V DC

Impulse Voltage, Uimp
12 kV

Standoff Insulators:


Termate’s RAM4 standoff insulator range provides excellent electrical insulation and mechanical strength for a variety of railway applications. Compact standoff insulators can also be referred to as pillar insulators, insulating posts, bobbin insulators, or busbar isolators.

This standoff insulator range is available in heights from 30 mm to 60 mm and insert sizes of M6 to M12. Technical data is found on the table above which displays heights, thread size and depth, maximum tightening torques, tensile and cantilever strengths, and box quantities available.

  • Made from UL 94 V-0 rated, self-extinguishing material
  • Halogen & Red Phosphorus Free
  • Operating temperature range of −20 °C to +130 °C (−4 °F to +266 °F)
  • Insulation voltage of up to 1000 V AC, 1500 V DC
  • Equipment voltage of up to 1000 V AC, 1500 V DC

View our standoff insulator cross-reference tool. Find our RAM1, RAM2 and RAM6 ranges here.

Our standoff insulators are made from a halogen and red phosphorus free glass-reinforced material, which was specifically chosen for its low smoke emission and flammability characteristics in addition to excellent mechanical and electrical insulation properties.

Brass inserts are used due to this alloy’s resistance to corrosion. The injection moulding process, combined with our excellent quality control and inspection procedures, results in a consistent product across every production run.



The RAM4 range of standoff insulators is an important product in the Termate catalogue. Prior to entering production, the insulators were subjected to a comprehensive suite of tests that examined their electrical and mechanical performance capabilities.

All tests were conducted within industry standards and with strict quality control measures enforced throughout. This rigorous testing procedure ensures our products are always performing optimally, providing customers with reliable and high-quality insulation solutions. We take pride in providing our customers with the highest quality of products, ensuring all safety and performance requirements are met.

RAM4 standoff insulators are manufactured from material that meets the requirements for IEC 60695-11-10 & UL 94 V-0. UL 94 being a standard for the safety of flammability of plastic materials for parts in devices and appliances released by the Underwriters Laboratories.

Our standoff insulators are suitable for railway applications up to 1000 V AC or up to 1500 V DC. These insulation supports provide a solution for electrical systems that need the assurance of safe and secure insulation.

In installations which require electrical isolation, they ensure that distance is maintained between two surfaces. This maintains the required level of mechanical strength and electrical insulation needed to safely contain live conductors, such as busbars. Usual installations are within:

  • Battery Energy Storage Systems
  • EV power trains
  • Drives, inverters and converters

These electrical insulating requirements can be found in a wide range of rolling stock & trackside applications in addition, environments where there is elevated concerns regarding smoke emission or flammability such as onboard vessels.

Termate is committed to the highest standard of customer focus and we have made every effort to maintain the accuracy and completeness of the information provided in this data. Where improvements to our products affect their installation and usage we endeavour to contact any customers who may be affected.

Warranty as stated in our Terms and Conditions of Trading is void if any modification is made to the warranted product.