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Shear Screws (Security Snap Off Screw)

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.

Available from Fastenright in sizes from M3 to M6 and lengths ranging from 6mm to 25mm.

Non-standard sizes and materials are available to order as specials, including custom parts made to drawings.Shear Screw Technical Drawing

Metric Technical Information & Available Sizes
Thread Diameter 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
Hexagon Head Height  (mm) 7.0
Hexagon Head Drive Size (mm) 2.0
Head Breaking Torque 1.47 n/m 1.96 n/m 2.55 n/m 4.22 n/m
Available Sizes M3 M4 M5 M6
6mm black icon image
8mm black icon image black icon image
10mm black icon image black icon image black icon image
12mm black icon image black icon image black icon image
16mm black icon image black icon image
20mm black icon image
25mm black icon image
black icon image = Available
Size not listed? Please call to discuss – we may be able to provide it.

See all Security Screws here.

Shear Screws

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