Name: Wedge Anchor Bolt
Brand: DonMo Hardware

Product Overview

The wedge anchor bolt is a heavy-duty mechanical expansion anchor designed for permanent fastening into solid concrete, grout-filled concrete masonry units and solid brick. When the nut is tightened, the wedge clip at the base of the anchor expands against the walls of the drilled hole, creating a strong, reliable hold that resists both static and dynamic loads.

DonMo Hardware manufactures wedge anchors in zinc-plated carbon steel for dry indoor applications and stainless steel SS304 / SS316 for outdoor, coastal and corrosive environments. Our wedge anchors are available in metric sizes from M6 to M20, with standard lengths ranging from 50mm to 300mm. Custom lengths and thread configurations are available for project-specific requirements.

Wedge anchors are widely used in structural and construction applications where high load capacity is required, including steel structure base plates, machinery mounting, guardrails, handrails, facade systems, pipe supports and electrical equipment mounting.

How Wedge Anchors Work

Drill: Drill a hole into the concrete using a hammer drill with a carbide-tipped masonry bit. The hole diameter must match the anchor diameter (e.g., M10 anchor = 10mm hole).
Clean: Remove all dust and debris from the hole using a wire brush and compressed air or a blow-out bulb. Clean holes ensure maximum expansion and holding power.
Insert: Insert the wedge anchor through the fixture and into the drilled hole until the washer and nut are flush against the fixture surface.
Tighten: Tighten the nut to the recommended torque value. As the nut tightens, it pulls the anchor upward, forcing the wedge clip to expand against the concrete walls.

Key Features

High Load Capacity: Wedge expansion mechanism provides exceptional holding power in solid concrete, suitable for heavy-duty structural and machinery fastening.
Consistent Performance: Manufactured with precise tolerances to ensure reliable expansion and predictable load values across every batch.
Material Options: Zinc-plated carbon steel for indoor dry use; SS304 and SS316 stainless steel for outdoor, coastal and corrosive environments.
Wide Size Range: M6 to M20 diameter, lengths from 50mm to 300mm, with custom lengths available for special projects.
Easy Installation: Standard drill-and-tighten installation with common tools. No special setting tools required.
Versatile Application: Suitable for concrete, solid brick and grout-filled CMU. Ideal for structural steel, machinery, guardrails, facades and pipe supports.
Quality Certified: Dimensional inspection, torque testing and material certification on every batch. Optional load testing reports available.

Specifications

Parameter	Specification
Product Name	Wedge Anchor Bolt (Expansion Concrete Anchor)
Anchor Type	Wedge-type mechanical expansion anchor
Base Material	Solid concrete (normal weight), grout-filled CMU, solid brick
Material	Carbon Steel (Grade 4.8 / 5.8 / 8.8), SS304, SS316
Surface Finish	Zinc plated (yellow / white), hot-dip galvanized, plain stainless (passivated)
Diameter Range	M6, M8, M10, M12, M14, M16, M18, M20
Length Range	50mm – 300mm (custom lengths available)
Drill Hole Diameter	Same as anchor diameter (e.g., M10 anchor = 10mm drill bit)
Minimum Embedment Depth	M6: 30mm / M8: 40mm / M10: 50mm / M12: 60mm / M16: 75mm / M20: 90mm
Thread Type	Metric coarse thread (standard)
Head / Drive	Hex nut with flat washer (included)
MOQ	Standard sizes: 100 pcs / size; Custom: 500 pcs
Lead Time	Stock items: 3–5 days; Custom production: 15–25 days
Certification	ISO9001, Material Test Report, Certificate of Conformity, optional ETA / load test report

Recommended Torque Values

Anchor Size	Torque (N·m) — Carbon Steel	Torque (N·m) — Stainless Steel
M6	10	8
M8	20	16
M10	35	28
M12	55	45
M16	110	90
M20	180	150

Note: Torque values are for reference only in normal-weight concrete (≥20 N/mm²). Always verify with project specifications and conduct pull-out tests for critical applications. Do not use wedge anchors in lightweight concrete, hollow block or uncured concrete.

Applications

Structural Steel: Fastening steel columns, base plates, beams and bracing to concrete foundations.
Machinery & Equipment: Mounting industrial machinery, pumps, motors, generators and HVAC units to concrete floors.
Guardrails & Handrails: Securing guardrail posts, handrail stanchions, safety barriers and bollards to concrete.
Facade & Curtain Wall: Anchoring facade brackets, curtain wall systems, cladding supports and sunshade structures.
Pipe & Duct Supports: Fastening pipe racks, cable trays, ductwork and conduit supports to concrete walls and ceilings.
Electrical & Lighting: Mounting electrical panels, transformer bases, lighting poles and sign structures to concrete.
Infrastructure: Bridge railings, noise barriers, expansion joint hardware, tunnel fixtures and transportation infrastructure.

Frequently Asked Questions

Q: Can wedge anchors be used in hollow brick or aerated concrete?

A: No. Wedge anchors are designed specifically for solid concrete, grout-filled concrete masonry units and solid brick. They should NOT be used in hollow block, lightweight concrete, aerated concrete (AAC), or uncured concrete. For hollow base materials, we recommend sleeve anchors, hollow-wall anchors or chemical anchors instead.

Q: What is the difference between a wedge anchor and a sleeve anchor?

A: A wedge anchor has a split wedge clip at the tip that expands only at the bottom of the hole, providing higher load capacity in solid concrete. A sleeve anchor has a full-length sleeve that expands along the entire embedment depth, making it more versatile for different base materials but with slightly lower ultimate load. Wedge anchors are preferred for heavy-duty structural applications in solid concrete.

Q: Are wedge anchors removable?

A: Wedge anchors are designed for permanent installation and are generally not removable. Once expanded, the wedge clip is set in the concrete. The nut and washer can be removed, but the anchor stud will remain in the hole. If you need a removable anchor, consider chemical anchors with threaded rod or other removable fastening systems.

Q: Can I use stainless steel wedge anchors outdoors?

A: Yes. SS304 wedge anchors are suitable for most outdoor applications. For coastal areas with saltwater exposure, chemical plants, or highly corrosive environments, we recommend SS316 (A4) stainless steel for maximum corrosion resistance. Zinc-plated carbon steel anchors should only be used indoors in dry environments.

Q: Do you provide load test data or ETA certification?

A: We provide standard Certificate of Conformity and material test reports with every order. For projects requiring formal load verification, we can arrange third-party pull-out testing and provide test reports. ETA (European Technical Assessment) certification is available for specific product lines on request — please contact us for details and lead time.