Description
Reliable Electric Fence Insulators for Star Pickets
The Thunderbird EF-18S Pinlock Insulators provide a fast, durable and secure method for mounting electric fence wires to steel star pickets. Designed for Australian farming and rural conditions, these insulators ensure effective current flow while preventing energy loss through the steel post.
The simple pinlock system allows for quick installation and easy wire tensioning, making them ideal for new fence setups, upgrades, or repairs.
Key Features & Benefits
Designed specifically for steel star pickets
Pinlock mechanism for secure wire retention
Suitable for polywire, polytape and high-tensile wire
Heavy-duty UV-stabilised plastic for long outdoor life
Prevents power leakage for improved fence efficiency
Quick and easy installation – no special tools required
Ideal for permanent or temporary electric fencing
Applications
Cattle and livestock control
Horse paddocks and electric horse fencing
Rotational grazing systems
Temporary fencing for property management
General rural and agricultural electric fencing
Specifications
| Specification | Details |
|---|---|
| Product Code | EF-18S (Available in bags of 25 or 100) |
| Brand | Thunderbird |
| Type | Pinlock Star Picket Insulator |
| Post Compatibility | Steel star pickets |
| Wire Compatibility | Polywire, polytape, high-tensile wire |
| Material | UV-stabilised plastic |
| Colour | Black |
| Installation | Clip-on with locking pin |
| Use | Electric fencing |
Why Choose Thunderbird?
Thunderbird electric fencing products are trusted across Australia for their durability, reliability, and performance in tough rural environments. The EF-18S insulator helps maintain strong fence voltage, improving livestock control and reducing maintenance.





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