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Hex Lag Bolts

DIN 571 Hexagon Head Wood Screws for Timber & Structural Applications

VALTOR supplies hex lag bolts, also known as DIN 571 hexagon head wood screws, for heavy-duty timber fastening and structural wood applications. Featuring a hexagonal head, partial smooth shank and coarse wood thread, these fasteners provide reliable installation performance in wood construction, outdoor structures and general timber assemblies.

Product
Hex Lag Bolts
Standard
DIN 571
Head / Drive
Hexagonal Head / External Hex
Thread
Coarse Wood Thread
Shank
Partial Smooth Shank
Tip
Pointed Tip
Materials
304 / 316 Stainless Steel · Carbon Steel
Application
Timber and Structural Wood Fastening
Customization
Custom Size, Material and Packaging Available

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Product Overview

Hex lag bolts are heavy-duty wood fastening screws designed for timber and structural wood applications. Also known as DIN 571 hexagon head wood screws, hex lag screws or coach screws, they feature a hexagonal head, partial smooth shank and coarse wood thread designed to provide strong engagement in wood materials.

Compared with standard wood screws, hex lag bolts provide higher installation torque through the external hex head design, allowing installation with common wrench tools. The deep coarse thread profile improves holding performance in timber and wood-based materials, while the pointed tip supports correct starting and penetration.

VALTOR supplies 304 stainless steel hex lag bolts and 316 stainless steel lag screws for outdoor and corrosion-sensitive wood applications. Zinc plated carbon steel hex head wood screws are available for general fastening requirements. Only realistic material and finish combinations are presented for this product.

Typical applications include timber structures, outdoor wooden assemblies, landscaping projects, construction components and exterior wood applications. As a hex lag bolts supplier and custom hex lag screws manufacturer, VALTOR can evaluate diameter, length, material and packaging requirements according to project needs.

Technical Specifications

Reference fields for DIN 571 wood screw purchasing; exact dimensions should be confirmed against the project requirement.

Product Type
Hex Lag Bolts
Standard
DIN 571
Alternative Name
Hex Lag Screws / DIN 571 Wood Screws / Coach Screws
Head Type
Hexagonal Head
Drive Type
External Hex Drive
Thread Type
Coarse Wood Thread
Shank Type
Partial Smooth Shank
Tip Type
Pointed Tip
Material
304 Stainless Steel · 316 Stainless Steel · Carbon Steel
Diameter
Available Standard Sizes · Custom Sizes Available
Length
Available Standard Sizes · Custom Length Available
Surface Finish
Plain Stainless Steel · Passivated · Zinc Plated Carbon Steel
Application
Timber and Structural Wood Fastening
Customization
Custom size, material and packaging available
Hex lag bolts install directly into wood and normally do not use a nut like conventional machine bolts. Pilot-hole and installation requirements should be confirmed for the timber and screw size.

Wood Fastening Design

Hex lag bolts combine a high-torque hex head, coarse thread profile and structural wood engagement capability.

1Hex Head Installation — The external hex head allows installation using standard wrench tools and provides reliable torque transfer during fastening.
2Coarse Thread Engagement — The deep coarse thread design improves holding performance in timber and wood-based materials.
3Partial Shank Structure — The smooth shank section helps draw connected materials together and improves fastening stability during installation.
4Outdoor Material Options — Stainless steel options provide improved corrosion resistance for exterior wood applications, while carbon steel options are available for general fastening requirements.

Surface Finishes

Only product-appropriate standard material and finish options are shown.

304 / 316 Stainless Steel
Natural / Plain FinishPassivated When Required
Carbon Steel
Zinc Plated

Other materials or finishes are not listed as standard and require specific customer evaluation.

Custom Hex Lag Bolt Solutions

VALTOR supports customized hex lag bolts according to diameter, length, material, finish and packaging requirements. Customers can provide drawings, samples or application requirements for evaluation.

1Diameter & Length — Standard and custom dimensions can be reviewed according to the timber connection.
2Material Selection — Choose 304 stainless steel, 316 stainless steel or carbon steel according to the service environment.
3Finish Requirements — Plain or passivated stainless steel and zinc plated carbon steel options can be evaluated.
4Packaging Options — Bulk and customer-specific packaging can be supplied for qualified orders.

Quality & Documentation

Documentation can be provided to support customer verification and traceability.

Material Test Certificate (MTC)
Raw Material Reports
Dimensional Inspection
Product Inspection Documentation
Third-Party Inspection

Availability & Delivery

Availability, sample feasibility and lead time depend on size, material and packaging.

MOQ
Specification Based
Confirmed per inquiry
Samples
Available on Review
Depends on requirements
Standard Sizes
Check Availability
By size and material
Custom Production
Project Lead Time
Confirmed after review

Packaging & Private Label

Standard and customized packaging options for B2B supply.

Packaging Options
Paper BoxCartonWooden PalletBulk PackingWooden CaseCustomized Packaging
Private Label

Custom branded packaging is available for qualified customers after proper brand authorization.

Applications

Heavy-duty wood screws for timber connections, outdoor structures and structural wood fastening.

Stainless steel hex lag bolts fastening a galvanized steel bracket directly into a heavy timber beam
01

Timber Construction

Hex lag bolts for timber construction are commonly used for timber frames, structural wood connections and heavy-duty wood assemblies requiring reliable fastening.

02

Outdoor Wooden Structures

Suitable for outdoor structures including decks, pergolas, fences and other timber constructions where corrosion resistance may be required.

03

Landscaping Projects

Used in wooden landscaping structures, outdoor installations and timber-based construction projects.

04

Wood Building Components

Applied in wooden building components, structural assemblies and construction-related timber connections.

05

Exterior & Coastal Wood Applications

316 stainless steel hex lag bolts can be considered for selected exterior and coastal wood applications where improved corrosion resistance is required.

Frequently Asked Questions

What are hex lag bolts used for?

Hex lag bolts are mainly used for timber construction, structural wood connections and heavy-duty wood fastening applications.

What is the difference between hex lag bolts and standard bolts?

Hex lag bolts are DIN 571 style wood screws designed to install directly into wood materials using coarse threads, while standard bolts normally require a nut for fastening.

Why choose stainless steel hex lag bolts?

Stainless steel provides improved corrosion resistance for outdoor and moisture-exposed wood applications.

Can hex lag bolts be customized in different sizes and materials?

Yes. Diameter, length, material and packaging can be customized according to customer requirements.

Can samples be provided before bulk production?

Yes. Samples can be arranged depending on size, material and production requirements.

Need Hex Lag Bolts for a Timber Project?

Share the required DIN 571 size, material, timber application or packaging requirements with VALTOR for evaluation and quotation.

Request A Quote




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