Kinmar® Permanent System
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 a shear point and leaving no unplated surfaces, it leaves a clean smart finish.

Available in Case Hardened Steel Zinc Plated (CR-3) and Geomet®, also stocked in A2 Stainless Steel.

Kinmar® Permanent drive is also available in bolt form M8 x 25mm / M8 x 40mm.
Other materials and finishes available to order subject to minimum order quantities.
Hafren Security Fastener products currently aren’t held in stock but are available to order.

Please contact us at or call 01268 288880 for delivery details

Need further product information? Click here to download the Hafren Security Fasteners handbook.

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