M10 Shear Nut A4 stainless steel (Permacone - snapoff - Security - Tamper Proof)


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M10 Shear Nut A4 stainless steel (Permacone - snapoff - Security - Tamper Proof)

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80 15% £ 0.65
100 20% £ 0.61
200 25% £ 0.58
500 30% £ 0.54
1000 35% £ 0.50
2000 40% £ 0.46
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50 10%
80 15%
100 20%
200 25%
500 30%
1000 35%
2000 40%

M10 Shear Nut A4 stainless steel (Permacone - snapoff - Security - Tamper Proof)

Shear nuts are also known as breakaway nuts, inviolable nuts, snap off nuts, security nuts, tamper proof nuts or permacone nuts. They are a permanent security solution ideal where maintenance is not required.

They are designed to prevent unauthorised tampering or removal of equipment and facilities. They are typically used in public areas (schools, hospitals etc) and within the fencing industry, e.g. for security perimeter fencing.

Tightened using standard spanner or socket

Breakaway nuts – how they work:

The hexagon nut section is fully tightened with a standard spanner until the pressure applied exceeds the maximum torque limit, which causes the hexagonal part of the nut to break off. This leaves a plain tamper resistant cone shape which is extremely difficult to remove as there is nothing to grip.


Thread: M10

AF (Across Flats) = 17 mm

B = 17 mm

D = 9 mm

C = 1.5 mm

Breaking Torque : 37 - 45 Nm

Data sheet
Material T316 Stainless Steel (A4)
Thread Size M10
Product Type Nuts - Shear / Tamper Proof
Delivery Details

We offer a range of delivery options based on the weight of the overall shopping cart and your specific location.

After adding the products to the shopping cart you will see a range of options based on delivery to mainland UK. Change country and the delivery options will be modified for your address.

  • Please be aware of our latest order times for same-day dispatch (2 PM)
  • We ship orders every weekday
  • Be aware of current stock levels (shown on the product page and the checkout page)
  • Be aware of our shipping terms and conditions (CLICK HERE) which basically state we may upgrade delivery at our discretion and that we are not responsible for late deliveries outside of our control


Every product page and the cart shows the current stock level. Our normal practice is to only ship the full order unless the shortfall is our fault.

If you can see we are short of stock and want to receive what we have as soon as possible, and the remainder when they are available, then add this product to the shopping cart also (UK Only):


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