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Shear Screws (Security Snap Off Screw)

Security shear snap-off screws

Premium 1-way permanent security screws, (also know as snap-off screws, break away screws, break-off screws and breakaway head screws) for use where maintenance is not required.

  • Tamper resistant dome head security screw
  • Security screw with unique shear off (snap-off) feature
  • Fastened using a standard spanner or cross recess driver
  • Ideal for use in prisons, banks, automotive, MOD and aerospace
  • Suitable for critical security areas

Snap-off security screws

These snap-off screws are manufactured as a dome security fasteners. The security feature is the hexagonal shaped section on top of the bolt, which 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 to snap off, leaving a plain tamper resistant head.

The design of the drive makes security shear screws suitable for higher security applications, where no maintenance is required as once they are fixed, they cannot be removed.

Available from stock in A2 Stainless Steel, see stock chart below. Other sizes and materials available to order with relatively short lead times. We can also manufacture to your specification or drawing.

See all security screws here

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

Features

Vandal Resistant 1 Way Permanent Security Screw With Unique Shear (Snap) Off Feature
Tamper proof – Permanent Security Fixing
Requires Standard Spanner or Cross Recess Driver

Security Shear Screw

Security Shear screws are manufactured in A2 stainless steel but can also be made to customer specifications.

These security screws are manufactured as a dome security fasteners. The security feature is the hexagonal shaped section on 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 to snap off (break off), leaving a plain tamper resistant head

Due to the security drive design of the security Shear Screw it is suitable for higher torque applications and is a way permanent fixings making it the ideal security fastener for applications where maintenance is not required.

Security Shear Screws offer a premium security resistance against vandals and thieves and are often used in applications that require optimum security and are currently used on security critical projects such as ministry of defence, aerospace, automotive, prison cells and in banks.

Within the industry security shear bolts are also referred to by other names including Snap Off Bolts, Break away Bolts, Break Off Bolts and Breakaway Head.

The Vandal Resistant Security Shear Bolt offers one of the best 1 way permanent security solutions available on the market.

Looking for a different type of security screw? Click here to view all security screws.

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