Expansion Bolts-High-Strength Anchors for Concrete and Masonry

Working Principle

1. Drill the Hole – Drill a hole of the correct diameter and depth in the base material.
2. Insert the Anchor – Place the expansion bolt assembly into the hole until the washer sits flush.
3. Tighten the Nut – Tightening the nut pulls the bolt’s cone into the sleeve, forcing it to expand.
4. Anchor Effect – The sleeve wedges tightly against the hole walls, creating a secure locking effect.

Key Advantages

• Higher Load Capacity – Provides far greater pull-out strength than nails or screws.
• Wide Compatibility – Works in both hard (concrete, solid brick) and soft materials (drywall, hollow blocks).
• Easy Removal – Can be unscrewed for disassembly or repositioning.
• Minimal Base Damage – Requires only drilling, leaving the surrounding material intact.
• Anti-Loosening Designs – Premium anchors feature lock-nuts or serrated elements for vibration resistance.

Types and Materials

• Metal Expansion Anchors – Heavy-duty wedge and sleeve anchors, ideal for concrete and structural fixings.

• Plastic Expansion Anchors – Nylon or PVC anchors for light-duty applications on softer bases.

• Chemical Anchors – Resin or epoxy-based anchors with extremely high bond strength.

• Hollow-Wall Anchors – Toggle bolts or hollow-set anchors for gypsum board and hollow bricks.

Installation Tips

• Drill depth should be about 5mm deeper than the anchor sleeve.
• Hole diameter should be slightly larger than the anchor’s diameter (e.g. 10mm hole for a 6mm anchor).
• Whenever possible, use solid concrete for maximum strength.
• Tighten 2–3 turns until resistance, then continue to fully expand. Avoid overtightening.

Applications and Custom Solutions

Expansion bolts are widely used in construction and maintenance:

• Fixing steel beams, railings, and columns to concrete foundations.
• Mounting heavy equipment, piping, and machinery.
• Installing wall-mounted cabinets, mirrors, TVs, and shelves.
• Anchoring electrical panels, transformers, and mechanical equipment.

Handan Hangfan Metal Products Co., Ltd. supplies expansion bolts, anchor bolts, screws, nuts, washers, and custom fasteners. With OEM/ODM services, ISO-certified production, and global shipping, we are your reliable partner for fastening solutions.

For inquiries, bulk orders, or custom designs:

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