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.

A2 Stainless Steel Kinmar® Permanent Nut

Product Details

A2 Stainless Steel 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; case hardened steel zinc plated (CR-3) and Geomet®
  • 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 Driver Size Part No. Small Box Qty
M5 A2 Stainless Steel KM6P KMPN05-S 100
M6 A2 Stainless Steel KM6P KMPN06-S 100
M8 A2 Stainless Steel KM8P KMPN08-S 100
M10 A2 Stainless Steel KM10P KMPN10-S 100
M12 A2 Stainless Steel KM12P KMPN12-S 100


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