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Kinmar® Security Permanent One Way Nut

Tamper Resistant Kinmar Permanent Security Nuts

The Kinmar® tamper resistant permanent security nuts are a superior alternative to shear nuts, providing high torque and leaving no unplated surfaces.

Hosting a unique, patented head design, Kinmar® permanent security nuts have unique indentations in the rounded shape of the nut that provide security and high torque and make the fixing cost-effective and efficient in applications that require high-level security when maintenance is not required.

Often found in security fencing, street furniture, public transport and playgrounds, these nuts require a matching driver to fasten the nut and tighten accordingly. The Kinmar® permanent tool is designed to fit both hand and power tools for fast, efficient installation. Should the nut become loosened due to vibration, it can be retightened. The tools are restricted in supply, making sure that the fixing is not able within the public domain – and we will not provide tooling to a customer who has not purchased the nut from us.

Available in A2 stainless steel, zinc plated case hardened steel or Geomet – with the case hardened steel further enhancing the security of the nut as it helps prevent hacksawing or chiselling the nut off, whilst also providing more torque.

Standard sizes range from M5 to M12, with sizes not listed also available to order as specials.

If you need a reusable fixing see the Kinmar® security removable nut.

Not what you’re looking for? See all security nuts here.

Please contact us with your requirements to further your enquiry.

Kinmar permanent nut technical drawing

 

Pin Pentagon Security Machine Screws With Button Head
Thread Diameter M5 M6 M8 M10 M12
Head Diameter (DK) 12.1
12.1
16.1
20.1
24.2
Head Height (K) 5.6 5.6 7.3
9.2 10.6
Available Sizes M5 M6 M8 M10 M12
BZP Steel black icon image black icon image black icon image black icon image black icon image
Geomet black icon image black icon image black icon image black icon image black icon image
A2 Stainless Steel black icon image black icon image black icon image black icon image black icon image
Other sizes available subject to minimum order quantity.

 

Kinmar Permanent Security Nut