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.

Flange Head Stainless Steel System Zero® Self Tapper

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.

  • Full range of Self Tapping and Metric Machine Screws
  • Stocked in A2 Stainless Steel or Zinc Plated Steel


Security Rating Explained

Diameter Length Material Driver Size Part No. Small Box Qty
No.4 (2.9mm) 1/4" (6mm) A2 Stainless Steel SZ3 SZS04B-S 100
No.4 (2.9mm) 1/2" (13mm) A2 Stainless Steel SZ3 SZS04D-S 100
No.6 (3.5mm) 1/4" (6mm) A2 Stainless Steel SZ4 SZS06B-S 100
No.6 (3.5mm) 1/2" (13mm) A2 Stainless Steel SZ4 SZS06D-S 100
No.6 (3.5mm) 3/4" (19mm) A2 Stainless Steel SZ4 SZS06F-S 100
No.6 (3.5mm) 1" (25mm) A2 Stainless Steel SZ4 SZS06G-S 100
No.8 (4.2mm) 1/4" (6mm) A2 Stainless Steel SZ4 SZS08B-S 100
No.8 (4.2mm) 1/2" (13mm) A2 Stainless Steel SZ4 SZS08D-S 100
No.8 (4.2mm) 3/4" (19mm) A2 Stainless Steel SZ4 SZS08F-S 100
No.8 (4.2mm) 1" (25mm) A2 Stainless Steel SZ4 SZS08G-S 100


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