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Sentinel Countersunk Security Wood Screw

Sentinel Countersunk security wood screws are quick and easy to install, using only a standard cross head or Pozi driver. Quick to install with power drivers or standard screw drivers, these are a popular choice for installers and for large volume applications.

Sentinel countersunk wood screws have a unique head which can only be turned clockwise, so once securely tightened, they cannot be removed without using a drill.

  • 1-way permanent countersunk wood screw
  • Tamper-proof fixing for use where maintenance is not required
  • Suitable for high torque applications

Designed to fix to wooden surfaces, we recommend creating a pilot hole before inserting the wood screw.

The Sentinel drive offers medium security resistance against vandals and thieves at a relatively low cost. An adaptation of the original Nettlefolds ‘Pozi’ drive, designed to provide a secure and permanent fixing, and can be used in high volume, inserted with a power tool.

With high resistance to cam-out, Sentinel screws are a preferred choice for applications requiring high volume, labour intensive work.

Sentinel countersunk wood 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 improved security.

Available in Zinc plated, with other sizes and materials available to order.

Specials made to order, including medium / high volume manufacture, modifications and custom parts to drawings – please enquire.Sentinel Countersunk Security Wood Screw Technical Drawing

Imperial Technical Information & Available Sizes
Thread Diameter No.6 No.8 No.10 No.12
dk (mm) 6.8 8.4 9.8 11.7
k (mm) 2.5 2.8 3.5 4.2
Available Sizes No.6 (3.5mm) No.8 (4.2mm) No.10 (4.8mm) No.12 (5.5mm)
3/4″ (19mm) black icon image black icon image
1″ (25mm) black icon image black icon image black icon image
1. 1/4″ (32mm) black icon image black icon image
1. 1/2″ (38mm) black icon image black icon image black icon image
2″ (50mm) black icon image black icon image black icon image
2. 1/2″ (63mm) black icon image black icon image
3″ (75mm) black icon image
black icon image = Available
Size not listed? Please make an enquiry – we may be able to provide it.

Sentinel Countersunk Security Wood Screw

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