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2-Hole Countersunk Security Machine Screw

Tamper resistant 2 hole security machine screws, to protect against vandals and thieves.

These reusable security screws have a unique 2-hole system, where 2 holes are drilled into the head, requiring a special insert bit to insert and remove the screws. The holes can be drilled at different distances (between centres), so it is advisable to always purchase the screws and corresponding bits from the same supplier.

  • An aesthetic security solution
  • An economic secure solution
  • Low / medium security resistance
  • Reusable 2-way drive
  • Usable for lower torque applications

2 Hole security screws are generally used in areas where aesthetics are important. Within the industry, they are also referred to by other names including Snake Eye screws, Pig Nose Screws, Two Pin and Spanner Drive Screws.

Available from stock in A2 Stainless Steel, with other sizes and materials to order. Special 2 hole security screws can be made to order including small volume manufacture, modifications and custom parts to drawings.

Gauge / Length (mm) 6 8 10 12 16 20 25 30 35 40 50
M3
M4
M5
M6
OTHER DIAMETERS AND LENGTHS AVAILABLE TO ORDER

2 Hole Countersunk Head Security Machine Screws

Tamper Resistant 2 Hole Countersunk Head security machine screws are available off the shelf in stainless steel with other sizes and materials available to order.

This security screw has 2 holes drilled into the head, requiring a special insert bit to insert and remove.  The holes can be drilled at different distances (between centres), therefore it is advisable to always purchase the screws and corresponding bits from the same supplier.

The security drive design of the 2-hole screw makes it suitable for low to medium torque applications and it is a 2 way reusable fixings making it the ideal security fastener for applications where maintenance is required.
The two pin drive is designed mainly to offer some security but also to maintain the aesthetics of the application it is been used with.  This screw is more prone to cam-out than other security screws such as Pin Torx or Pin Hex security screws.  Users should also be aware that when tightening the screw the drive bits are prone to bending or breaking after prolonged use and should plan to purchase additional drive bits as backup.

Tamper resistant 2 Hole Security screws offer a medium security resistance against vandals and thieves at a relatively low cost , proving an economic and secure equilibrium.

For more information and technical data regarding tamper resistant 2 Hole security products please call our sales team.

Note: Special 2 Hole Security Screws can be made to order including small volume manufacture, modifications and custom parts to drawings.

Tamper Resistant 2 Hole machine screws can be used with security Wave Nuts, Shear Nuts, Kinmar Reusable Nuts, Kinmar Permanent Nuts, 4-Hole Nuts or Pin Torx Barrel Nuts for added security.

2 Hole countersunk machine screw technical drawing

M3 M4 M5 M6
DK (mm) 5.6 7.5 9.2 11.0
K (mm) 1.65 2.2 2.5 3
TOOL SIZE No.4 No.8 No.10 No.14

*For guidance purposes only

2 Hole Countersunk Security Screw