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.

System Zero® Insert Bit

Product Details

High torque security screws with incorporated flange head design for enhanced load distribution

System Zero® is a Level 3 'Medium Security' fastener, with the ability to be installed and removed using the matching driver tool. The unique head design, in combination with the driver, gives a high torque transmission which in turn generates high clamp loads.

The innovative external non-slip drive head features indentations that have been crafted to ensure optimal grip when used with the matching security tooling, facilitating seamless high torque fastening and removal.

?The incorporated flange design efficiently spreads the load when attaching plastic components, enhancing stability and durability.

Security Rating Explained

Size Driver Size Part No. Small Box Qty
SZ3 M2.5, M3, ST2.9 and ST3.5 SZ3-B 1
SZ4 M3.5, M4 and ST4.2 SZ4-B 1
SZ5 M5 and ST4.8 SZ5-B 1
SZ6 M6, ST5.5 and ST6.3 SZ6-B 1


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