Tri-Groove

Tri-Groove fasteners feature a conical head with three equally spaced notches that require a corresponding socket tool to install or remove. The tapered shape is designed to deflect gripping tools, making unauthorized removal more difficult.

These fasteners are commonly used in outdoor lighting, security enclosures, and metal signage posts, especially in public or commercial environments.

Matching Tri-Groove sockets and fasteners are widely distributed and can be freely purchased online or in stores.

What We Thought

This fastener is widely available and lacks meaningful tool control or tamper resistance. While often marketed as a "security screw," it does not meet our standards for the security classification. It may deter casual tampering but offers very little protection against intentional removal.

Good For

General Fastener Use

Not Good For

Security Use

See Why

Product Facts

We compiled these "product facts" using publicly available information, expert analysis, and reasonable assumptions where data was incomplete. Some details (like pricing, torque specs, and break-in times) aren’t always disclosed, so we’ve filled in the gaps as accurately as possible.

For verified specs or specific use-case guidance, we recommend reaching out directly to the manufacturer.

Feature: Value
Driver Availability: Widely available; sold in stores and online.
Maximum Torque (MFR Claim): Moderate; varies by size and material.
Minimum Quantity: Low: Often available in small packs.
Average Break-In Time: Low: Easily removed in minutes.
Cost Per Fastener: Low: Varies by supplier, size, and material.
Samples Available: Likely available from distributors.
Keyway Type: Standard, not proprietary.
Tool Control: N/A: Bits widely available to public.
Head Style Options: Button, flat, pan, socket; varies by supplier.
Material Options: Steel, stainless steel (e.g., 304, 316), sometimes brass or zinc-plated—depends on supplier.
Reusability: Reusable with matching bit; integrity depends on torque and material.
Tamper Resistance: Low: Easily defeated with standard bits or modified tools.
Tool Compatibility: Compatible with standard bits; widely available tools.
Installation Method: Manual or power-driven with bit; standard installation process.
Visual Deterrence Level: Low: Recognizable shape signals basic security, not highly deterrent.
Removal Risk if Tool Leaks: N/A: Tool/Bit is widely available.
Lead Time to Purchase: N/A: Commonly stocked item.