Security Ratings Explained
Security Ratings
Explained
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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.

Round Head Clutch Head Machine Screw

Product Details

Round Head A2 Stainless Steel Clutch Head Machine Screw

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 Self Tapping Screws

Click to view technical data.

 

Security Rating Explained

Size Length Material Part No. Small Box Qty
M3 50mm A2 Stainless Steel CHRM0350 100
M4 8mm A2 Stainless Steel CHRM0408 100
M4 10mm A2 Stainless Steel CHRM0410 100
M4 12mm A2 Stainless Steel CHRM0412 100
M4 16mm A2 Stainless Steel CHRM0416 100
M4 20mm A2 Stainless Steel CHRM0420 100
M4 25mm A2 Stainless Steel CHRM0425 100
M4 30mm A2 Stainless Steel CHRM0430 100
M4 35mm A2 Stainless Steel CHRM0435 100
M4 40mm A2 Stainless Steel CHRM0440 100
M4 45mm A2 Stainless Steel CHRM0445 100
M5 10mm A2 Stainless Steel CHRM0510 100
M5 12mm A2 Stainless Steel CHRM0512 100
M5 16mm A2 Stainless Steel CHRM0516 100
M5 20mm A2 Stainless Steel CHRM0520 100
M5 25mm A2 Stainless Steel CHRM0525 100
M5 30mm A2 Stainless Steel CHRM0530 100
M5 35mm A2 Stainless Steel CHRM0535 100
M5 40mm A2 Stainless Steel CHRM0540 100
M5 45mm A2 Stainless Steel CHRM0545 100
M5 50mm A2 Stainless Steel CHRM0550 100
M6 12mm A2 Stainless Steel CHRM0612 100
M6 10mm A2 Stainless Steel CHRM0610 100
M6 16mm A2 Stainless Steel CHRM0616 100
M6 20mm A2 Stainless Steel CHRM0620 100
M6 25mm A2 Stainless Steel CHRM0625 100
M6 30mm A2 Stainless Steel CHRM0630 100
M6 40mm A2 Stainless Steel CHRM0640 100
M6 50mm A2 Stainless Steel CHRM0650 100
M8 12mm A2 Stainless Steel CHRM0812 100
M8 20mm A2 Stainless Steel CHRM0820 100
M8 30mm A2 Stainless Steel CHRM0830 100
M8 40mm A2 Stainless Steel CHRM0840 100
M8 50mm A2 Stainless Steel CHRM0850 100
M8 60mm A2 Stainless Steel CHRM0860 100

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