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Clutch Head - Countersunk Twinthread Woodscrew - BZP Hardened Steel

The Clutch Head Screw is the original one way security screw, which is installed using a standard flat blade screwdriver and once installed cannot be easily removed.

Clutch Head Countersunk Twinthread Woodscrews are almost impossible to remove without drilling them out, making them a popular choice as a security screw for permanent installations. 

Obviously, a two way screw such as one of our Security Torx screws would be a better choice if you think you may ever need to remove the screws again to release the item they are securing.

 

 

Other Security Clutch Head Screws available from stock -

Clutch Head Machine Screws -

   Round Head Machine Screws
  
Clutch Head Wood Screws and Self Tapping Screws -

   Countersunk Twin Thread Woodscrews
   Countersunk Self Tapping Screws 
   
Round Head Self Tapping Screws



Note
: These one way screws are installed with a standard flat bladed screwdriver

          A posidrive style clutch head screw is also available - see Sentinel Screws

 

   ...for other types of Security Fasteners - click on the individual links across the top of the page

   ...or to see All Security Screws and Fasteners - click on Start Selection Again

   ...for Bespoke Manufactured Screws   -  ...Contact us

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Step 3 - now select the size you need by clicking on the appropriate 'Eye' logo (stock items) below:

LENGTH

3/4"

1"

1-1/4"

1-1/2"

2"

2-1/2"

3"

GAUGE

19mm)

25mm)

32mm)

38mm)

50mm)

63mm)

75mm)

6

(3.5

8

(4.2

10

(4.8

12

(5.5

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