3/8" UNC nut 3/8" UNC hex nut, self-locking with nylon insert

3/8" UNC hex nut with nylon insert, for connections that simply must not come loose

Sometimes you don’t need a spectacular high-tech solution, just a nut that holds reliably – permanently. That’s exactly where the 3/8" UNC hex nut with nylon insert comes in. It is designed for standard 3/8" UNC threads, the coarse imperial thread you know from many machinery, equipment, and assembly applications.

Precise 3/8" UNC right-hand thread for stable connections

The thread of this nut is a 3/8" UNC right-hand thread. For you, this means: you can easily combine it with common 3/8" UNC screws, bolts, or threaded rods as used in mechanical engineering, toolmaking, or for sturdy constructions in hobby projects. Thanks to the UNC profile, the nut grips firmly into the material, which is a real advantage especially for dynamically loaded connections.

Self-locking thanks to nylon insert, less retightening, more peace of mind

The crucial difference compared to a standard hex nut: inside sits a nylon insert. This ensures that when tightened, the nut slightly “bites” into the thread and thus develops a self-locking effect. In short: it does not loosen easily on its own, even when vibrations, impacts, or frequent movements are involved. You therefore need to retighten much less often and can create connections that remain reliable even after a long time.

18-8 stainless steel, robust, durable, suitable for everyday use

The nut is made of 18-8 stainless steel. This is a proven stainless steel that is not easily affected in everyday use: moisture, changing temperatures, occasional wet conditions – none of this is a big deal. Especially if you work outdoors, in the workshop, or in a mildly corrosive environment, this is a noticeable advantage. The combination of stainless steel and nylon insert makes the nut a reliable component you don’t have to keep worrying about.

Hex shape for easy installation with standard tools

The nut has the classic hex shape. You simply tighten it with an open-end wrench, ring spanner, or socket – nothing exotic, no special tools. This is particularly practical if you use different types of nuts in your project, such as hex nuts, wing nuts, or knurled nuts, and still don’t want to keep changing tools during assembly.

Practical dimensions and weight, compact and handy

With a typical height of about 11.9 mm and a maximum diameter of around 19.3 mm, the 3/8" UNC nut fits neatly into common constructions without being unnecessarily bulky. At about 15 g, the weight is pleasantly moderate – light enough for mobile applications, but solid enough to inspire confidence. Especially when you install several nuts in one assembly, you’ll notice that the handling feels just right.

Ideal as part of a set with other 3/8" UNC nut types

In many projects you combine different types of nuts: a knurled nut when you want to adjust something without tools, a wing nut for quick manual operations, and a hex nut when it needs to be really tight and permanent. This self-locking 3/8" UNC hex nut fits perfectly into such a set, taking on the role of the “safety instance” wherever nothing is allowed to come loose on its own.

Areas of application from workshop to hobby, flexible use

Whether you are working on machines, building a frame, securing a bracket, or simply looking for a reliable connection in a DIY project: this 3/8" UNC nut with nylon insert is a solid choice. It plays to its strengths wherever vibrations, recurring movements, or changing loads occur. And yes, even though it’s “just” a nut, once it doesn’t come loose, you’ll quickly notice how much trouble it saves you.