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Sentinel Countersunk Security Machine Screw

Countersunk Head Sentinel Screws have a unique head which can only be turned one way, meaning that once they have been securely tightened they are very difficult to remove.

Installed using a standard crosshead or Pozi driver, they are quick to install with both screwdrivers and power drivers and are a popular choice for installers and large volume applications.

The sentinel drive offers medium security resistance against vandals and thieves at a relatively low cost.

It is an adaptation of the original Nettlefolds Pozi Drive, designed to provide a secure and permanent fixing, and can be used in high volume. With high resistance to cam-out, these screws are the preferred choice for applications requiring high volume, labour intensive work.

Available in Zinc plated from Fastenright, with thread sizes from M4 to M6 and lengths ranging from 12mm to 40mm.

Non-standard sizes and materials are available to order as specials, including custom parts made to drawings.Sentinel Countersunk Security Machine Screw Technical Drawing

Metric Technical Information & Available Sizes
Thread Diameter M4 M5 M6
dk (mm) 7.2 8.9 10.8
k (mm) 2.7 3.0 3.6
Available Sizes M4 M5 M6
12mm black icon image black icon image black icon image
16mm black icon image black icon image black icon image
20mm black icon image black icon image black icon image
25mm black icon image black icon image black icon image
30mm black icon image black icon image black icon image
40mm black icon image black icon image
black icon image = Available
Size not listed? Please make an enquiry – we may be able to provide it.

Sentinel Countersunk Security Screws

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