Shear Nuts


Shear Nuts and Shear Bolts are permafix one way security fasteners which once installed cannot be removed with conventional spanners.


They are installed using standard tooling (e.g. spanner, socket set, etc.). When the Shear Nut or Bolt is fully tightened, the hexagonal drive head is designed to shear off as additional torque is applied, leaving the shear bolt or the threaded conical lower collar of the shear nut in position on the standard bolt or stud thread, thus making these products permanent fixings.
 
 

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Shear Nuts are available manufactured from A2 Stainless Steel, or from steel with a BZP (Bright Zinc Plate) or weather resistant Galvanised finish.

Many sizes available from stock - other sizes can be manufactured to special order.

The sizes shown below are normally available from stock:

Shear Nuts - Stainless Steel

shear nut stock BZP

Shear Nut Stock Items - Galvanised

 

Shear Nut Dimensions & Technical Information:

Shear Nuts - Technical Sheet
 

Shear Nut - Installation Guide:

 
Shear Nut Installation Guide
They are installed using standard tooling (e.g. spanner, socket set, etc.). When the nut or bolt is fully tightened, the hexagonal drive head is designed to shear off as additional torque is applied, leaving the shear bolt or the threaded conical lower collar of the shear nut in position on the standard bolt or stud thread, thus making these products permanent fixings.
 

Uses and Applications:

Shear Nut - Application

Saddle Bolts are often used with Galvanised Shear Nuts, i.e. for protecting Palisade Fencing installations:

Saddle Bolt
 
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