Testimonials

sign in / register

Shear Nuts

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

What are Shear Nuts?

Shear nuts are a form of versatile, one way security fastening that doesn’t require any special tooling. They consist of a threaded conical section with a non-threaded hexagonal section that’s used to tighten them. Once tightened using a standard spanner or socket drive, additional pressure will exceed the shear-torque of the nut and shear off the hexagonal section, leaving only the tightened, smooth, secure conical section in place.


video icon   WATCH VIDEO


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.

Shear Nut Sizes - 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
As noted, shear nuts are easilty 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
 
                                                                                                                                back to Security Screws and Fastenings Index
Back to top
About insight Security
WHY BUY FROM INSIGHT SECURITY?
  • It's easy to order from us and we're easy to contact...
    whether you need help or advice before or after you buy
  • Our proven, tried and tested products do what we say...
    which is why we can offer you a 'NO QUIBBLE GUARANTEE'
  • Fast Reliable Service... your goods will normally be delivered within 1 to 3 working days - call us if you need them urgently!
  • All our products are very competitively priced... but more importantly, we believe they offer you the Very Best Value!

...these are just a few of the reasons that most of our customers buy from us regularly and recommend us to friends and peer groups. So buy now with confidence - and join the thousands of happy customers we have helped over the last 20 years... and remember, if you're not sure what you need, or which solution is best for you, our specialist advisors will be pleased to help. Just call us on 01273 475500.