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.

Zinc Plated Armour Ring™

Product Details

Zinc Plated Steel (CR-3) Armour Ring™

A simple conical collar which renders a standard hexagon nut or bolt tamper resistant.

The Armour Ring™ can be applied to any British or DIN standard hexagon nuts or bolts using a standard hammer. It leaves a smooth clean finish which is often favoured by Health & Safety executives and isn't governed by a torque level like some one-way fasteners.

  • Has been Home Office approved
  • Also stocked in 303 S31 Stainless Steel


Security Rating Explained

Size Material Finish Part No. Small Box Qty
M6 Case Hardened Steel Zinc Plated AR06-Z 100
M8 Case Hardened Steel Zinc Plated AR08-Z 100
M10 Case Hardened Steel Zinc Plated AR10-Z 100
M12 Case Hardened Steel Zinc Plated AR12-Z 100
M16 Case Hardened Steel Zinc Plated AR16-Z 1


* indicates required