Sentinel Countersunk Security Machine Screw

Sentinel security screws – countersunk head

Countersunk head sentinel screws have a unique head which can only be turned one-way, so once securely tightened, they are very difficult to remove.
Sentinel security screws are installed using only a standard cross head or pozi driver. Quick to install with screwdrivers or power drivers, these are a popular choice for installers and for large volume applications.

1-way permanent security fixing
Tamper-proof for use where maintenance is not required
Countersunk head security screw
Suitable for high torque applications
Good for use with power drivers
Typically used in prisons, public facilities and toilets and for industrial roofing

Countersunk head security machine screws

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 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.

Available from stock in zinc plate, 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.