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Clutch Head Round Self Tapping Security Screws

Round Head Tamper Proof Self Tapping Clutch Head Screws

Clutch Head Screws are permanent, tamper-resistant screws that require only a slotted screwdriver to fit.

Their unique head makes these screws an ideal security fastener for one way, permanent applications.

Most commonly found in public areas such as commercial toilet facilities, where maintenance is not required – but security is essential to prevent vandals tampering.

They provide an excellent, permanent solution for mass usage, but can be time-consuming to install. When fast installation is essential, we can also offer the Sentinel Security Screw.

Also referred to as clutch drive, one way round screws and perma screws, these screws are suitable for medium torque applications. The unique drive system has a special chamfer at either side of the slotted drive, enabling the screws to be turned in only one direction.

Non-standard sizes and materials are available to order as specials, including custom parts made to drawings.Clutch Head Round Self Tapping Security Screws Technical Drawing

Imperial Technical Information & Available Sizes
Thread Diameter No.4 No.6 No.8 No.10 No.14
dk (mm) CALL
6.3
7.6
8.8
11.7
k (mm) CALL 2.5
2.9
3.4 4.4
Available Sizes (mm) No.4 No.6 No.8 No.12 No.14
3/8″ (9.5) black icon image
1/2″ (13) black icon image black icon image black icon image black icon image black icon image
5/8″ (16) black icon image black icon image black icon image black icon image black icon image
3/4″ (19) black icon image black icon image black icon image black icon image black icon image
1″ (25) black icon image black icon image black icon image black icon image
1. 1/4″ (32) black icon image black icon image black icon image black icon image
1. 1/2″ (38) black icon image black icon image black icon image
2″ (50) black icon image black icon image black icon image
2. 1/2″ (63) black icon image
3″ (75) black icon image
black icon image = Available
Size not listed? Please call to discuss – we may be able to provide it.

Not what you’re looking for? See all security clutch head screws here.

Clutch One Way Round Self Tapping Security Screws

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