In the world of fasteners, hex nuts stand as fundamental components that play a pivotal role in countless applications. These small, six-sided wonders are designed to be paired with bolts, creating secure connections that hold together everything from machinery to structures.
Hex nuts, often referred to simply as "nuts," are one of the most common types of nuts used in various industries. They are characterized by their hexagonal (six-sided) shape, which provides flat surfaces for wrenches or sockets to grip during installation. Hex nuts have internal threads that match the threads of compatible bolts. Refer to thread pitches here. When a hex nut is threaded onto a bolt, it creates a clamping force that holds materials or components securely together.
Bolt & Hex Nut Compatibility
Hex nuts are designed to be paired with specific types of bolts based on the thread, strength and finish they have. Here are some common bolt pairings for hex nuts:
- Hex Bolts
- Hex Cap Screws
- Threaded Rod
Generally speaking, you will want to match the strengths, corrosive resistance and finish (color) as well. It’s not that you can’t mix-and-match; they will physically fit together as long as the pitch and diameter are the same. However, your risk of failure increases when you do so. There is also an aesthetic component to consider.
Here are some common matches seen in the field:
Hex Nut Specifications
By far, the two most commonly used hex nuts are Grade 5 and Grade 8. Find their specifications below. Note that these specs are very similar to other hex nut grades and finishes.