Sentinel Button Security Machine Screw

Button Head Sentinel Screws have a unique head which can only be turned clockwise; meaning that once they have been tightened securely, they cannot be removed without drilling out.
Installed using a standard crosshead or Pozi driver, sentinel security screws are quick to install with either power drivers or standard screwdrivers and are a popular choice amongst installers for large volume applications.
The drive of the screw offer 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.
With a high resistance to cam-out, they are the preferred choice in applications that require high volume, labour intensive work.
Available from Fastenright as standard in Zinc plate. Thread diameters from M4 to M8 and lengths ranging from 12mm to 50mm.
Non-standard sizes and materials are available to order as specials, including custom parts made to drawings.