BLOG

Scroll through the story of Security Locknut below. A MILITARY PRODUCT How It All Began In December 1915, Edward A. Green invented the...

Security Locknut uses a coordinate-measuring machine (CMM) to monitor manufacturing consistency and quality. Check out the video below...

Here’s a recent field test showing the installing of a 2”x 4.5 nut that highlights the issue. Left: Nuts were initially tightened with an...

Surprise results testing bolt tension with different lubricants. Test Setup Bolt and Nut Used for the Tests Predicted Results Before...

Castellated nuts, often called a castle nuts, employ cotter pins as a locking mechanism. We will walk through two key points that render...

Let’s compare a typical assembly using one nut and a bolt against the use of double nuts. Single Nut When the nut is rotated in the...

Last time, we discussed why you may not need a locknut if the joint is properly designed and assembled. But, in the real world, on...

You shouldn’t need a locknut if the bolted joint is properly designed and assembled. This means it’s designed to hold the working load,...

The relationship between input torque and tension is the governing principle behind a well-designed bolted joint. Often, calculated...

It is well understood that a fastener will fail if it is loaded above its capacity, as shown in example #1 below. What is less obvious is...

Hint: not as much as you think. To answer this question, let’s start with an example of a fastener assembly with a 3/4″ x 10 Grade 5 bolt...

Answer: a very small but important amount. In previous posts we discussed how a bolted joint works, how clamp force is calculated, and...

We are often asked what torque value should be used with a specific nut/bolt assembly. First, it’s helpful to understand that torque is a...

Clamp force is what holds a bolted joint together. Published charts are available for determining clamp force but we’ve found it’s often...

A standard bolted joint consists of four parts: a fastener, object A, object B, and a bolt. The threads on a nut, unraveled, are an...