Header fastener image

Security Fasteners and General Fixings from Stock and to order

Click Now for a Quote

Call +44(0) 1902 457734

Twitter Icon Facebook Icon LinkedIn Icon Skype Icon

Sentinel Countersunk Security Machine Screw

Sentinel Security Screws with Countersunk Head

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 from stock in zinc plate, with a range of sizes and materials to order as specials.

Please contact us with your requirements to further your enquiry.

Thread / Length (mm) 12 16 20 25 30 40
M4
M5
M6

Countersunk Sentinel Security Screw Technical Information

Sentinel countersunk machine screw technical drawing

M4 M5 M6
DK (mm) 7.2 8.9 10.8
K (mm) 2.7 3.0 3.6

*For guidance purposes only

Sentinel Countersunk Security Screws