Tamper Resistant Fasteners

Hampden Fence is proud to offer a range of high quality fasteners and fixing solutions, purpose designed for superior tamper resistance to provide an additional level of security on your fencing projects.  Please contact us today to find out more about our range of tamper resistant fasteners and fixings - perfect for making your next fencing project more secure than ever. 


LOCK-BOLT - Huck Bolt Pin & Collar Fastener

The ultimate fastener for high security is a Rivtec lock-Bolt (Huck Bolt pin and collar fastener). This type of bolt is not threaded like a conventional bolt and nut assembly.

Instead the Huck Bolt has a series of annular grooves which a round collar is swaged onto (using an air/hydraulic installation tool). The advantages of this system are;

  • Vibration/Tamper resistant (no threads so cannot loosen)
  • High shear and tensile strength
  • Permanent clamp force applied to the workpiece
  • Quiet and simple installation
  • Visual inspection
  • No special operator skills required
  • Stainless steel option for corrosion resistance
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ARGUS – Non-removable Security Screws

Introducing Argus - the ultimate non-removable security screw for superior peace of mind on your fencing projects. With genuine one way installation Argus security screws are virtually impossible to remove. Argus have high torque application-maximum clamping load and provide inexpensive ¼ hex insert bit tooling. Case hardened steel delivers superior chisel/drill/saw resistance.

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  • One-way installation
  • Virtually impossible to remove
  • High torque application - maximum clamping load
  • Inexpensive 1/4 hex insert bit tooling
  • High corrosion-resistant finish
  • Case hardened steel - chisel/drill/saw resistant
  • Machine screws from stock - M8x40, M8x50, M8x80, M8x100, M10x80, M10x100
  • Self threading screws from stock - M8x35, M8x45
  • Other sizes available to manufacture

QUAD-DRIVE – The Newest Tamper Resistant Security Screw

Quad-Drive self-threading screws can only be removed and inserted with a special Security Fasteners and Fixings Ltd bit (which is registered by Fencing Distributors). The 50mm long drive bit fits directly into drill chuck and works in perfect unison with the unique tamper resistant drive. With hardened steel for high corrosion resistance, Quad-Drive security screws also offer superior resistance to drill/saw/chisel attack. 

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  • Unique tamper resistant drive
  • Only removed and inserted with a special SFF bit
  • 50mm long drive bit fits directly into drill chuck
  • Hardened steel with high corrosion resistance
  • Resists drill/saw/chisel attack
  • Machine screws from stock - M8x40, M8x50, M8x80, M8x100, M10x80, M10x100
  • Self threading screws from stock - M8x35, M8x45
  • Other sizes available to manufacture

SECURITY CONSTRUCTION FIXINGS – Removable and Non-Removable Fixings

With a unique tamper resistant recess (a special tool is required for installation/removal) our security construction fixings are ideal for security grills, machine fixtures and guards, hand and guard rails etc. With hardened steel to combat drill/saw/chisel attacks, they also offer high screw corrosion protection (840hrs salt-spray).

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  • Unique tamper resistant recess - special tool 
    required
  • High screw corrosion protection - 840 hrs salt-spray
  • Hardened steel to combat drill/saw/chisel attack
  • Ideal for security grills, machine fixtures & guards, had & guard rails etc
Bolt øLengthDrill øMax. Fixing ThicknessMin. Hole Depth
10mm (M8)50 mm10 mm6 mm50 mm
80 mm35 mm
100 mm57 mm
12 mm (M10)80 mm12 mm22 mm65 mm
100 mm40 mm
 

SHEAR NUTS – Shear Torque = Tamper Proof Domes

The hex portion of the Shear Nut shears away when correct torque is achieved, leaving a tamper proof dome. Available in a range of different sizes, materials and finishes.

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  • Available in the following sizes: 6mm, 
  • 8mm, 
    10mm, 12mm, 16mm.
  • Use with a standard spanner/socket
  • 30° angle for greater resistance against removal by conventional tools
  • Hex portion shears when correct torque is achieved
SizesNmlb / ftMaterial
6 mm6-115-8Mild steel
8 mm13-2110-15Stainless steel
10 mm31-3423-28Finishes: Zinc / Dacromeet / J5500 / Galvanised
12 mm47-5535-40Other materials/finishes on request
 

IRIUS® TAMPER DRIVE – Universal Security Fastener

Self drilling screws – for rapid installation into steel. Low profile tamper resistant underhead drive (virtually invisible once in-situ) with unique driving tool – not universally available unlike many security drives. Excellent for use in conjunction with Security Fasteners and Fixings Mesh-Loc washers for securing welded mesh. Powder coated head in any colour to order and Stainless Steel available in certain sizes. 

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  • Low profile tamper resistant underhead drive - 
  • virtually invisible once in situ
  • Unique driving tool - not universally available unlike many “security” drives
  • Self drilling screws - for rapid installation into steel
  • Available C/W EPDM bonded washers
  • Powder coated head in any colour to order
  • Excellent for use in conjunction with our mesh-loc washers for securing welded mesh
  • From stock - Zn12 5.5x25 (for up to 3mm sheet), 
    5.5 x 32 (for up to 3mm sheet), 5.5x38 (for up to 3mm sheet)
  • Stainless steel available in certain sizes

ARMA5™ – Self-drilling Security Screws

The Arma5™ Security Drive is perfect for fastening component parts to steel in one operation by drilling, threading and sealing. It, therefore, reduces time and reduces labour costs. Uses a high-security Arma5 Pin Drive Bit with a drilling capacity from 1.75mm - 5.25mm. 

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  • Arma5 Security Drive - for fastening component parts to steel in one operation - drilling, threading, sealing and reduced labour costs
  • High Security Arma5 Pin Drive Bits - Dacromet 500 Hr corrosion finish, drilling capacity from 1.75 - 5.25mm
  • Optional Sealing Washer - Stock sizes are 5.5x25mm & 5.5x38mm, other sizes available to order