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Pin Hex Countersunk Security Machine Screw

Pin Hex Countersunk Security Screws Stock Sizes

  • Countersunk head security screw
  • Medium security resistance
  • Reusable 2-way drive
  • Requires special driver bit or key for fixing and removal
  • Suitable for higher torque applications
  • An economic security solution

Available in A2 or A4 stainless steel and all stocked sizes are listed below. Pin Hex countersunk head screws in non-standard sizes and materials available to order. Small volume manufacture, modifications and custom parts also available to order

Thread / Length (mm) 6 8 10 12 16 20 25 30 35 40 50 60 90

Description: Pin Hex Countersunk Security Screws

Pin Hex Countersunk Head Security Machine Screws are vandal resistant and can only be fixed and removed by using a special driver bit or key to fit the Pin Hex Drive.
The Pin Hex drive makes it ideal for applications requiring medium security and where the fixing needs to be removed for maintenance

Advantages of Pin Hex screws

  • Designed to reduce cam-out, which can occur in Phillips and 2-hole drives
  • Less risk of damaging the drive tip, screw head and also the application
  • The Hex drive also allows better torque compared to conventional screw heads<
  • Special driver bit or key required

Pin Hex security screws offer a medium security resistance against vandals and thieves at a relatively low cost.
Within the industry Pin Hex security screws are also referred to by other names including Hex Pin, Tamper Pin Hex, Socket Screw with Pin and Din 7991 with Pin.
Tamper Resistant Pin Hex 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.
Please see the stock size chart and technical information for all available sizes.

Pin Hex countersunk machine screw technical drawing

M3 M4 M5 M6 M8 M10 M12
DK (mm) 5.7 7.7 9.8 11.8 15.1 19.3 23.2
K (mm) 1.7 2.3 2.8 3.3 5.0 6.7 7.4
S (mm) 2 2.5 3 4 5 6 8
TOOL SIZE 2mm 2.5mm 3mm 4mm 5mm 6mm 8mm

*For guidance purposes only