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Security Fasteners and General Fixings from Stock and to order

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Socket Shear Bolts

Security Socket Shear Bolts are for use where no maintenance is required, as they are a premium 1-way permanent security solution.

  • Vandal-resistant one-way security bolt
  • Unique snap-off (shear) feature
  • Fastened using a standard hex Allen key or screwdriver
  • Ideal for use in prisons, banks, automotive, MOD and aerospace

Security shear bolts, which are often referred to as breakaway bolts or snap off bolts, offer a secure fixing solution for applications that need the highest level of security.

They are fastened using a standard key wrench or screwdriver instead of a socket tool or spanner. Once fully tightened to the breaking torque (18/25 nm), the conical-shaped socket portion attached to the head snaps off – leaving a slim profile, plain head, with no drive with which to remove the bolt.

Security tools are not required, but the bolt is irremovable once it has been fastened in place, meaning these fasteners are not suitable for applications that require maintenance.

Shear bolts offer one of the best permanent security solutions currently available on the market, and the nature of the bolt means that it is suitable for higher torque applications. It is always worthwhile determining whether future maintenance will be required on the application you are fixing the bolt within, as they cannot be removed once fastened.

These socket shear bolts are often used in environments requiring high security – such as prisons, banks, Ministry of Defence and even the automotive and aerospace industries.

They are generally manufactured in A2 Stainless Steel, with other materials available to order.

Popular sizes are held in stock at Fastenright, with other sizes available to order with relatively short lead times.

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

See our full range of shear bolts here.

Shear screw technical drawing


Metric Technical Information & Available Sizes
Thread Diameter M8
dk (mm) 13.0
k1 (mm) 8.6
k2 (mm) 1.0
SW (mm) 6.0
Breaking Torque 18 – 25 n/m
Available Sizes M8
6mm black icon image
8mm black icon image
10mm black icon image
12mm black icon image
16mm black icon image
20mm black icon image
25mm black icon image
30mm black icon image
35mm black icon image
40mm black icon image
45mm black icon image
50mm black icon image
black icon image = A2 Stainless Steel
Size not listed? Please call to discuss – we may be able to provide it.

Socket Shear Bolt

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