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Shear Screws (Security Snap Off Screw)

Security Shear Snap-off Screws

Shear Screws are premium one-way permanent security screws for use when maintenance is not required. They are also known as snap-off screws, break-away screws, break off screws and break-away head screws.

These screws are manufactured as dome security fasteners. The security feature is the hexagonal shaped section on the top of the bolt. This is fully tightened with a standard spanner or cross recess driver until the pressure applied surpasses the maximum torque limit, resulting in the hexagonal part of the shear screw snapping (breaking) off – leaving a plain, tamper-resistant head.

Due to the security drive design of the shear screw, it is suitable for higher torque applications.

They offer a premium security resistance against vandals and thieves and are often used in applications that require optimum security and are often used on security-critical projects such as ministry of defence applications, aerospace, automotive, prison and banking.

The vandal resistant security shear bolt is one of the best permanent security solutions on the market.

Please contact us with your requirements to further your enquiry.

See all security screws here

Thread / Length (mm) 6 8 10 12 16 20 25
M3
M4
M5
M6

Security Snap Off Screw Technical Information

Shear screw technical drawing

M3 M4 M5 M6
DK (mm) 5.5 7.0 9.0 10.5
K (mm) 2.0 2.6 3.3 3.9
HEXAGON
HEAD
WIDTH A/F (mm) 6.0
HEIGHT (mm) 7.0
DRIVE SIZE (mm) 2.0
HEAD BREAKING TORQUE (N/M) 1.47 1.96 2.55 4.22

*For guidance purposes only

Shear Screws