Going Nuts: Metric Nuts at Mr. Metric

nutsNo provider of metric fasteners would be complete without a full line of metric nuts, and at Mr. Metric we have more nuts stored away than a squirrel at wintertime. But what do all these different nuts do, and which type or types do you need to purchase? Let’s take a glimpse at the world of nuts.

The essential purpose of any nut is to mate with a bolt to discourage the bolt from loosening its grip against a surface. When you thread a nut onto a bolt until it sits tight against the opposite side of the surface from the bolt head, you create a kind of stress on the threads called preload that holds both parts in position. Nuts come in a wide range of sizes and shapes, though the trusty six-sided hex nut is probably most well known. Some nuts have shapes that allow for protruding bolt heads, such as the acorn nut with its hollow cap-shaped head. Wing nuts have wing-shaped handles for easy tightening by hand. Sometimes the shape of the bolt determines the shape of a nut. If you’re using a square bolt, for instance, you’d want a square nut.

Vibration can eventually loosen a bolt even if that bolt is secured by a nut. How can you forestall this problem if your structure will face constant vibration during its working life? Well, you can always place a second nut innermost to the surface. This nut receives about 50 percent of the torque of the outermost nut, which receives full torque. Another solution involves the use of a locking nut. Locking nuts have internal or external teeth that bite into the surface for extra grip.

Check out our online selection, and if you’re still going nuts finding the right item, contact us for help.

About the author

Mr. Metric is the spokesperson for www.mrmetric.com, an online store for metric fasteners. Get $7.50 flat shipping with no minimum orders, plus advice and best practices for using metric fasteners in any application.

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