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.

Case Hardened Steel Bright Zinc Plated Kinmar ® Permanent Nut

Product Details

Steel Zinc Plated (CR-3) Kinmar® Permanent Nut

The ultimate high security patented one-way nut.

This patented permanent nut requires a matching driver socket for installation giving you guaranteed torque levels and can be re-torqued if required. Not governed by shear point and leaving no unplated surfaces, it leaves a clean smart finish.

  • Also stocked in; Geomet® and A2 Stainless Steel
  • Kinmar® Permanent drive is also stocked in bolt form M8 x 25mm / M8 x 40mm
  • Other materials and finishes available to order, subject to minimum order quantities


Security Rating Explained

Size Material Finish Driver Size Part No. Small Box Qty
M5 Case Hardened Steel Zinc Plated (CR-3) KM6P KMPN05-Z 100
M6 Case Hardened Steel Zinc Plated (CR-3) KM6P KMPN06-Z 100
M8 Case Hardened Steel Zinc Plated (CR-3) KM8P KMPN08-Z 100
M10 Case Hardened Steel Zinc Plated (CR-3) KM10P KMPN10-Z 100
M12 Case Hardened Steel Zinc Plated (CR-3) KM12P KMPN12-Z 100


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