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.

Stainless Steel Armour Ring™

Product Details

Stainless Steel 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 Steel Zinc Plated (CR-3)


Security Rating Explained

Size Material Part No. Small Box Qty
M6 A2 Stainless Steel AR06-S 100
M8 A2 Stainless Steel AR08-S 100
M10 A2 Stainless Steel AR10-S 100
M12 A2 Stainless Steel AR12-S 100
M16 A2 Stainless Steel AR16-S 1
M20 A2 Stainless Steel AR20-S 1


* indicates required