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.

Countersunk Clutch Head Self Tapper

Product Details

Countersunk A2 Stainless Steel Clutch Head Self Tapper

The original one-way security drive.

The special ridged design of this drive means that it can only operate in a clockwise motion. Installed using standard slotted screwdriver - no specialist tools required.

  • Also Stocked in; Case hardened Steel Zinc Plated (CR-3) Woodscrews & A2 Stainless Steel Metric Machine Screws

Click to view technical data.


Security Rating Explained

Diameter Length Material Part No. Small Box Qty
No.6 (3.5mm) 3/4" (19mm) A2 Stainless Steel CHCS06F 100
No.6 (3.5mm) 1" (25mm) A2 Stainless Steel CHCS06G 100
No.8 (4.2mm) 1/2" (13mm) A2 Stainless Steel CHCS08D 100
No.8 (4.2mm) 3/4" (19mm) A2 Stainless Steel CHCS08F 100
No.8 (4.2mm) 1" (25mm) A2 Stainless Steel CHCS08G 100
No.8 (4.2mm) 1-1/4" (32mm) A2 Stainless Steel CHCS08H 100
No.8 (4.2mm) 1-1/2" (38mm) A2 Stainless Steel CHCS08I 100
No.8 (4.2mm) 2" (50mm) A2 Stainless Steel CHCS08J 100
No.10 (4.8mm) 1" (25mm) A2 Stainless Steel CHCS10G 100
No.10 (4.8mm) 1-1/4" (32mm) A2 Stainless Steel CHCS10H 100
No.10 (4.8mm) 1-1/2" (38mm) A2 Stainless Steel CHCS10I 100
No.10 (4.8mm) 2" (50mm) A2 Stainless Steel CHCS10J 100


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