Introduction to Hex Nutserts - Benefits, Applications & Installation Guide

Introduction to Hex Nutserts

A hex nutsert is a unique threaded insert that allows you to tap threads into thin sheets of material. It consists of a hex shaped outer body with an inner coil thread. The coils are flexible and can be compressed to fit into a hole in sheet metal or other material. When a screw is inserted into the nutsert, the coils expand and grip the sides of the hole securely, creating strong and durable threaded holes.

Benefits of Using Hex Nutserts

Hex nutserts offer several advantages over other threaded inserts and fasteners:

• Create threads in thin materials: Nutserts can add strong threads to sheet metal, plastics, composites, and other thin materials that would otherwise crack under a tapped hole.
• Repair stripped threads: You can install a nutsert to repair a stripped threaded hole, restoring its structure and function.
• Install with simple tools: Basic hand tools are all you need to install a nutsert. No tapping equipment required.
• Vibration resistant: The coils grip tightly to prevent loosening, making nutserts ideal for applications with vibration or shock loads.
• Lightweight: Weighing just a few grams, nutserts add negligible mass to an assembly.

Common Applications of Hex Nutserts

Some of the most popular uses for hex nutserts include:

• Sheet metal enclosures and chassis: Add mounting points and threaded holes for attaching components.
• Machinery guards: Secure polycarbonate or metal mesh guards.
• Electronic enclosures: Create mounting points on thin plastic housings.
• HVAC ducting: Join and hang duct sections.
• Furniture: Provide threaded inserts for connecting parts.
• Appliances: Install threaded holes in panels and shells.
• Automotive: Repair or add new threaded holes to vehicle bodies.

How To Install Hex Nutserts

Installing a hex nutsert is a simple process that can be done with basic mechanical skills and hand tools.

Materials Needed

• Hex nutsert kit: Comes with nutserts, drill bit, and installation tool
• Sheet metal, plastic, or other substrate
• Drill
• Hex wrench
• Screwdriver or bolt

Installation Steps

1. Drill hole sized for nutsert’s outer width using supplied drill bit.
2. Insert nutsert straight into hole using its flat sides for alignment.
3. Attach installation tool and drive nutsert further into hole until flange is flush.
4. Remove installation tool and tug nutsert to ensure it grips hole tightly.
5. Rotate hex portion of nutsert with wrench to test threads.
6. Install screw and tighten to secure component.

Removal and Replacement

To remove a nutsert, use a screw that fits tightly into its threads. Tighten the screw while applying heat around 300°F to soften the coils’ grip. Unscrew the nutsert in reverse once loosened. Clean out the old hole thoroughly before installing a new nutsert.

Types of Hex Nutserts

There are several varieties of hex nutserts available to suit different applications:

Closed-End Nutsert

A solid end on one side makes this style ideal for through-hole applications. They prevent debris and leaks between compartments.

Flanged Nutsert

These feature a small flange on one end that sits flush against the material surface. The flange provides extra grip and load distribution.

Stainless Steel Nutsert

For corrosion resistance and compatibility with stainless steel hardware, choose stainless nutserts. The 303 and 316 grades meet various chemical resistance needs.

High-Temperature Nutsert

Capable of 500°F or greater, high-temp nutserts work in engine bays, machinery, appliances, and other hot environments.

Plastic/Nylon Nutsert

Alternatives to metal nutserts made of tough engineered plastics install without heat. They embed threads in softer materials like wood, concrete, and fiberglass.

Choosing the Proper Size Nutsert

To select an appropriate nutsert, consider the following key factors:

• Material thickness: Length must exceed total thickness.
• Thread size: Match internal threads to bolt diameter.
• Outer diameter: Hole must have close fit for optimal grip.
• Bolt head clearance on one side (if applicable).
• Shear and pull-out strength: Meet loading needs.

These determine overall geometry, thread dimensions, grip range, strength class, and other parameters. Installation kits come with properly matched nutserts, bits, and tools tailored for an application.

Designing Around Nutsert Limits

While very strong for their size, nutserts aren’t intended for extremely heavy loads. In high load situations, consider alternatives like welded threaded bosses. Or strategically place multiple nutserts to distribute shear forces. In dynamic applications, use self-locking hardware along with nutserts.

Hex Nutserts Summary

Offering durable threaded holes where none existed before, innovative self-anchoring hex nutserts punch above their weight. They save time and hassle compared to traditional threaded inserts or welded nuts. Engineers continue advancing nutsert technology to simplify installations while pushing strength limits. This makes them a versatile fastening component for solving old problems in new ways across many fields.

FAQs

What materials can I install a hex nutsert in?

Hex nutserts work with sheet metal, plastic, fiberglass, wood, and other thin materials or substrates. The material must be strong enough the grip the nutsert’s coils without crumbling.

What size hole do I drill for a #10 nutsert?

For a #10 sized nutsert, drill a 5/16" hole to allow it to fit while giving optimal grip and shear strength capacity.

How do nutserts secure themselves?

As you insert the nutsert, its pre-wound flexible metal coils are compressed. This spring like compression creates an outward force whichgrips the hole's interior when released.

Is special equipment required to install a nutsert?

You can install basic nutserts using only standard shop tools like a drill, hex wrench, mallet and screw. Installation kits provide matched bits and driving tools.

Can I remove a nutsert and replace it?

Yes, applying heat helps soften a nutsert's grip for removal. Thoroughly clean the hole and use an identically sized new nutsert for proper reinstallation and performance.