Conical Cap Expansion Bolt

The Conical Cap Expansion Bolt supplied by Wanluo manufacturer is a fully enclosed cone-shaped cap that can completely cover the nut and the exposed threads, effectively preventing rain, dust, moisture and external physical impacts. It solves the common problems of traditional expansion bolts, such as rusting of the threads, loosening of the nut, unsightly exposed parts and easy accumulation of dust. With its stable expansion locking performance and neat surface installation effect, it is an ideal fastener for outdoor decoration, municipal engineering and exposed installation scenarios.

Structural Features & Manufacturing Technology

The conical cap expansion bolt adopts one-piece precision stamping and thread rolling molding, consisting of a high-strength threaded rod, conical expansion core, multi-slit expansion sleeve, flat washer and integrated conical protective cap nut. The specially designed smooth arc conical cover has no sharp edges, realizing flat and beautiful installation finish while fully covering the fastening structure. The internal multi-slit expansion sleeve maintains uniform radial expansion performance, forming stable friction locking with the hole wall after tightening. Standard precision rolled threads ensure smooth locking and uniform stress, avoiding sliding and loosening. Made of high-quality carbon steel and stainless steel, with galvanized and passivation anti-corrosion treatment, the product features high structural toughness, rust resistance and weather resistance. Strict dimensional tolerance control ensures standard drilling matching and excellent on-site installation consistency.

Product Parameter

Core Advantages & Industrial Applications

1. Integrated conical cap dual protection design completely covers threads and nuts, effectively blocking rainwater infiltration, dust accumulation and air oxidation, greatly extending the service life of expansion bolts in outdoor open environments.

2. Smooth dome surface provides excellent decorative effect, solving the problem of messy and exposed installation of ordinary expansion bolts. The flat and neat mounting surface meets the aesthetic requirements of municipal and decorative engineering.

3. Built-in anti-loosening effect, the covered cap avoids direct external vibration and man-made collision on the nut, effectively preventing nut loosening and thread slipping caused by external interference, improving overall connection stability.

4. Retains excellent expansion performance of traditional external expansion bolts, with simple installation, strong substrate adaptability and high construction fault tolerance, no special tools required, suitable for large-scale rapid construction.

5. Multiple surface color treatments and material options, widely used in municipal guardrails, outdoor billboards, street lamp fixing, garden landscape facilities, exterior wall decoration and exposed decorative fastening projects.

FAQ

Q1: What is the difference between conical cap expansion bolts and ordinary expansion bolts?

A1: Ordinary expansion bolts have exposed nuts and threads, easy to rust and accumulate dust with poor appearance; conical cap expansion bolt adopt integrated protective dome design, with waterproof, dustproof, anti-rust and decorative functions, more suitable for outdoor exposed installation scenarios.

Q2: Does the conical cap affect the locking effect?

A2: No effect. The protective cap is integrated with the nut, which only plays a protective and decorative role. The internal expansion structure and locking principle are consistent with standard expansion bolts, ensuring stable and reliable fastening performance.

Q3: Is it suitable for long-term outdoor use?

A3: Yes. The fully enclosed protective structure isolates external harsh factors, and with galvanized and stainless steel anti-corrosion materials, it can resist wind, rain and sun exposure, maintaining long-term stable use in outdoor environments.

Q4: What scenarios are not suitable for this product?

A4: It is suitable for light and medium-load decorative and municipal fixing scenarios. For heavy-load mechanical equipment and strong vibration engineering anchoring, it is recommended to upgrade to wedge anchors or mechanical undercut anchors.

Q5: Can customized colors and sizes be provided?

A5: Yes. We support customizing cap color, polished appearance, special rod length and thickened reinforcement specifications to meet personalized decorative engineering needs.