Understanding Concrete Self-Tapping Anchors: The Reliable Fixing Solution from Qewit

Posted: November 14, 2025

Categories: News

Introduction

In today’s building and design work, fastening tools often act as the unsung parts that keep things steady. Among these, concrete self-tapping anchors—also known as concrete screws—shine for their power, quick setup, and steady hold. These tiny yet vital pieces let you attach metal sheets, braces, and fittings right into concrete. And you don’t need extra covers or sticky glues to do it.

At Qewit Fasteners Co., Ltd., accuracy and trustworthiness aren’t just aims. They are part of every item they make. The company draws from its roots in British factories and years of building know-how. As a result, Qewit has earned a solid spot among top names in fasteners and fixings around the world. They supply strong options for workers, builders, and experts in many places, from stainless steel bolts to special concrete anchors.

The Origin of Concrete Self-Tapping Anchors

In the 1990s, experts started to wonder about a basic but game-changing idea. Could screws go straight into concrete like they do in wood? That thought sparked the birth of the concrete screw. It’s a self-tapping anchor that digs into tough concrete. And it shapes its own inner threads as it turns.

Older anchors like expansion bolts, chemical anchors, or undercut anchors all need other pieces or glues to stay put. But the self-tapping anchor builds a direct mechanical link. This happens between the screw’s threads and the concrete. So, it gives both solid grip and simple setup. No added sleeves. No wait for glue to dry.

How Concrete Self-Tapping Anchors Work

A full self-tapping anchor includes five main sections. Each one has a clear job during setup.

1. The Tip – This end hits the concrete first. It cuts its own inner thread. Small bumps and a tough edge let it drill and tap in one go.
2. The Threaded Segment – This is the key spot for holding weight. Its spacing is broader than wood screws. That helps it grab better in concrete. The real anchoring starts right here.
3. The Transition Zone – It links the main threads to the smooth part. This adds extra steadiness.
4. The Smooth Shank – It holds the item you attach. And it backs up the whole setup.
5. The Head – It comes in forms like hex or flat. The choice fits the tool you use.

As you tighten it, the weight shifts from the screw’s body to its threads. Then it goes to the concrete around it. This flow is much like how rebar bumps work with concrete in strong builds. It makes a tight, shared load connection.

Why Engineers Choose Self-Tapping Anchors

Builders pick concrete self-tapping anchors for jobs that need power and fast work. They take fewer steps than expansion or chemical types. So, this cuts down on time and leftover stuff. Plus, you can take them out easily. That works well for short-term builds or ones you adjust often.

Expansion anchors push out to grab hold. But self-tapping ones link right to the concrete with threads. This lowers the chance of breaks while setting them in. They fit best in strong concrete, small spots, or places where exact fit counts.

From plans to real jobs, these anchors show up in many spots. Think mechanical setups, wall systems, and even fixes to old structures.

Mechanical Behavior and Load Transfer

The anchor’s power comes from how deep the threads dig into the concrete. The way threads touch the concrete side acts like two things at once. There’s a lock-and-key fit. And there’s a sticky hold. As the screw spins, the hard threads slice in. Then, the rub creates a snug lock.

Break points can differ based on the stuff and shape.

• Concrete cone failure happens when a chunk of concrete pulls free.
• Steel pull-out occurs if the screw slips from the concrete.
• Mixed failure blends both issues.

What happens mostly ties to the concrete’s pull strength and thread depth. Experts often tweak these to get the best steady hold.

The Challenge of Hydrogen Embrittlement

Even with all its perks, one worry for tough steel anchors is hydrogen embrittlement. When metals take in hydrogen—say, from plating or heating—their bendiness drops. This makes them likely to snap fast under pressure.

Qewit’s team handles this with tight checks and smart picks for materials. For anchors under HV350 hardness or less than 1000 MPa strength, tests for hydrogen aren’t needed by European rules. But they still check every group made. This keeps things safe and solid when loaded.

Qewit’s Expertise in Fasteners and Fixings

Qewit started in the United Kingdom. Now it runs from China. It mixes UK-style management with quick Asian making. Since 2004, it has helped fields in Europe, the Middle East, and Asia.

Their items range from basic bolts, nuts, and washers to special ones like concrete bolts, through bolts, masonry screws, and stainless-steel anchors. Every piece has full tracking, ISO 9001 approval, and choices for 3.1 material papers.

From making to shipping, Qewit also groups goods. They pull different items to one spot for one send-off. This helps sellers and buyers cut costs and wait time.

Customization and Technical Support

Not all jobs match ready-made lists. So Qewit offers made-to-order work. They build odd parts from sketches or samples. Choices include finishes like zinc flake, hot-dip galvanizing, and black oxide. You can add lock tabs or seal spots too. All to fit your needs.

Their own test rooms have pull machines, salt spray boxes, and hard check tools. These ensure full looks before send. If doubts come up, the support group shares fact sheets, clips, and extra checks. This builds faith with clear talk.

From Factory to Global Markets

Qewit sends to buyers in over 30 lands. It uses a fresh chain for quality, sameness, and quick moves. Fast items like DIN 934 hex nuts, DIN 931 bolts, or DIN 985 nylon insert nuts ship in one to two weeks.

The aim is clear: give a no-worry path from make to use. With over 30,000 lines and carbon-steel or stainless-steel picks, Qewit lets world buyers get many fasteners from one steady source.

Why Concrete Anchors Reflect Qewit’s Quality Philosophy

Concrete self-tapping anchors show the careful way Qewit works. They blend smart design, material smarts, and build rules. Each screw matches the firm’s vow—to bring hold you sense with every twist.

In the quick world of building now, jobs rely on parts that set fast and stay safe under weight. Qewit’s self-tapping anchors fill that need. They link new ideas to real use.

Conclusion

Concrete self-tapping anchors go beyond a basic fix item. They stand for how plain thoughts, done with care, can change whole fields. Through years of study, checks, and skill, Qewit Fasteners has honed this to match what builders want today—power, simple steps, and long life.

With its blend of European steady ways and Asian quick make, Qewit keeps as a sure helper for build and factory fix needs worldwide.

FAQs

Q1: What is the main difference between a concrete self-tapping anchor and an expansion anchor?

A: A self-tapping anchor forms its own internal thread in concrete, while an expansion anchor relies on mechanical expansion to grip the surface. The self-tapping type installs faster and can be removed or reused if needed.

Q2: Can Qewit manufacture non-standard anchor sizes or materials?

A: Yes. Qewit provides customized production based on drawings or samples, with options for carbon steel, stainless steel, brass, or alloy materials. Various coatings and surface treatments can also be applied.

Q3: How does Qewit maintain consistent quality across global shipments?

A: Every batch undergoes a full inspection process using in-house testing machines. Products comply with ISO 9001 standards and can be supplied with 3.1 certificates, ISIR, or PPAP documentation when required.