Hex Bolts

What Are Hex Bolts?

Hex Bolts are bolts with a hexagonal head and machine threads. Hex bolts are the most common construction fasteners. They have a hex head that can be secured with a socket or wrench and mated with a nut or other internally threaded item. Hex bolts are also referred to as Hex Cap Screws, Hex head screws, Tap Bolts, and Hex Cap Bolts. More info

Two Thread Types

These bolts come in two thread types, as seen below.

Fully threaded hex bolts

Fully threaded hex bolts are generally used with a tapped or threaded hole and screwed all the way down to the head. These are a great option when sideways force is not a concern.

Partially threaded hex bolts

Partially threaded hex bolts feature an unthreaded portion underneath the head that provides more holding power and greater strength from the sideways force since the unthreaded portion is much stronger than the threaded area.

Hex Bolts - Key Features

Hex bolts are typically used for machinery or construction. Their main features are as follows:

Strength and Durability

These bolts work well for machinery thanks to their strength, durability and shear resistance. They're typically fairly robust, but they come in an array of sizes, ranging from 1⁄4'' all the way to 1½”. This means that they're easy to use for diverse projects.

Frequently Asked Questions About Hex Head Bolts

Is a hex bolt the same as an Allen bolt?

No, these are similar but not the same. Hex bolts (it's a hex bolt not a hex screw), have six-sided heads, making it easy to fasten them using a socket or wrench. Allen bolts (or socket cap screws), on the other hand, are fastened using an allen or hex key.

Which materials are hex bolts made of?

Hex bolts generally consist of either galvanized steel or stainless steel.