Security Ratings Explained
Security Ratings

Hafren Security Ratings

Security Level 1

Entry Level
Fasteners offer protection from vandalism and opportunistic crime. Drivers can be purchased by the general public.

Security Level 2

Enhanced Security
Fasteners are less Common and less Recognizable. Driver Tooling is non-standard and Harder for the general public to buy.

Security Level 3

Medium Security
Rarer (less well-known) products. Supply of driver tooling is controlled, less readily available to buy, enhancing the security of the assembly.

Security Level 4

High Security
Either 1-way permanent fixing, or rare Hafren patented high security products requiring specialist tooling to remove (only available from Hafren approved distributors).

Security Level 5

Maximum Security
Highest security available. Products are either 1-way permanent fixings, or require bespoke exclusive, custom made driver tools to remove.

Introducing the Power6™ Security Screw

Power6™ Security Screw

Versatile tamper resistant self-threading security screw

Ideal for all types of fencing applications, the tri-Lobular self-threading screw eliminates the need for nuts, reducing labour costs & installation time.

For added security Power6™ security screws also feature the unique 2-way (removable) Power6™ security drive, which can only be removed with the unique Power6™ driver bit (pictured right) regular 6-Lobe/Pin Torx tooling will not fit this unique security drive.

What are tri-Lobular self-threading screw​s?

Tri-Lobular self-threading screw​s (also known as thread forming screws) are designed to tap (cut) their own threads as they are driven into a pre-drilled hole. This helps to eliminate the need for nuts or pre-tapped holes, dramatically reducing labour costs for installation.

The unique tri-lobular configuration provides a built-in locking device to help ensure joint integrity and resist loosening caused by vibration.

Materials and finish

The Power6™ Screws are Case Hardened Steel with a Geomet® 500 B coating. Benefits include;

  • Excellent corrosion protection
  • Integrally lubricated for quick and easy installation
  • Bimetal compatibility with aluminium
  • Paintable coating ideal for fencing applications

Stocked in Pan Head M8 x 35mm, Other sizes available to order.

To order or for more information call our expert sales team on +44 (0)1686 621 300, or email


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