Carriage bolts
Carriage bolts or cupsquare bolts as they are known in some parts of the world, are a popular bolt choice for a variety of fence systems.
These bolts can be used with ordinary hex nuts, or they can be combined with a shear-off nut or similar to make them harder to remove. However, the rounded head already makes this kind of bolt harder to tamper with, which is why they are a more frequent choice for fences that require some level of security.
Carriage bolts are available in galvanized, zinc-plated and stainless steel options, and they come in a variety of diameters and lengths, so you should be able to find the perfect bolt for every fence application.
Use our chain link fence calculator to calculate how many chain link fence rail ends and other fittings and materials you need for your fence project.