A Century of Support
for Timber Builders
Since 1912, Portland Bolt has been a trusted manufacturer of high-quality fasteners for structural wood and mass timber construction. From glulam and CLT buildings to bridges, piers, and large timber frameworks, our products are made to spec and built to last.
With 4 manufacturing facilities across the United States totaling 270,000 square feet of production space, Portland Bolt delivers the capacity and quality to support timber projects of every scale. Our Northwest and Southeast plants house state-of-the-art hot-dip galvanizing operations, offering a full suite of galvanizing services on both coasts.
Every process, from forging and threading to testing and inspection, is performed in-house for complete control over quality, traceability, and lead times. With in-house capabilities up to 6-inch diameters and a wide range of timber connection hardware, we deliver the durability your designs demand.
For over a century, Portland Bolt has supplied the fasteners that hold these structures together – precision-made, built to last.
With 4 manufacturing facilities across the United States totaling more than 270,000 square feet of production space, Portland Bolt delivers the capacity and precision to support timber projects of every scale.
Our Northwest and Southeast plants house state-of-the-art hot-dip galvanizing operations, providing corrosion protection on both coasts.
Every process from forging and threading to testing and inspection is performed in-house for full control over quality, traceability, and lead times. This vertically integrated process allows us to produce both large-scale and custom timber fasteners efficiently, meeting tight construction schedules without compromising craftsmanship or performance.
Portland Bolt manufactures fasteners for every kind of timber connection – from hex and square lag screws to tie rods, shear plates, and split rings.
Our products strengthen the connections that define both traditional craftsmanship and modern engineering.
At Portland Bolt, strength isn’t just measured in steel – it’s found in every timber connection we help create.
Trust our experience, on-time delivery, and American-made quality. Trust Portland Bolt to bring your next timber project to life.
Commonly Used Products
Hex Lag Screw »
Used for heavy timber joints and structural wood applications, hex lag screws provide strong mechanical anchoring where through-bolting isn’t practical. Portland Bolt manufactures lag screws up to 1-1/2 inches in diameter and offers hot-dip galvanizing for added durability in exterior timber environments.
Square Lag Screws »
Ideal for traditional or decorative timber framing, square head lag screws offer a distinctive, classic appearance while maintaining strength and reliability. Available up to 1-1/2 inches in diameter, they are often used in restoration work and exposed beam designs.
Timber Bolts »
Also known as dome head or economy bolts, timber bolts are a long-standing standard in marine and dock construction. Their large, domed head provides a wide bearing surface that helps prevent wood crushing and reduces installation time. Manufactured up to 1-1/2 inches in diameter.
Square Head Bolts »
Before hex bolts became the industry standard, square head bolts were the primary choice for timber and structural connections. Portland Bolt continues to produce these traditional fasteners up to 2 inches in diameter, making them ideal for historic restorations and exposed timber trusses.
Hex Bolts »
A universal fastener for structural connections, hex bolts deliver dependable strength for timber, steel, and hybrid assemblies. Portland Bolt manufactures custom hex bolts up to 2-1/2 inches in diameter in multiple ASTM grades and finishes, including hot-dip galvanized, zinc-plated, and plain steel.
Carriage Bolts »
Recognizable by their smooth round head and square neck, carriage bolts are widely used for wood-to-wood connections where a clean, tamper-resistant appearance is preferred. Portland Bolt manufactures carriage bolts from 1/2 inch to 1-1/4 inches in diameter in a variety of materials and finishes.
Structural Bolts »
When timber structures incorporate steel components, heavy hex structural bolts provide high-strength performance in accordance with ASTM F3125 Grades A325 and A490. Available from 1/2 inch to 1-1/2 inches in diameter, they are often used in hybrid timber-steel designs.
Tie Rods »
Tie rod assemblies reinforce heavy timber beams, trusses, and frames while adding an architectural element. Assemblies can include turnbuckles, clevises, and threaded rods, all manufactured to meet project-specific dimensions and finishes.
Shear Plates »
Shear plates are ductile iron connectors used in wood-to-steel or wood-to-wood joints to transfer load efficiently and reduce stress concentrations. Portland Bolt stocks a range of shear plate sizes from 2-5/8″ to 4″ suitable for mass timber and glulam applications.
Split Rings »
Split ring connectors are placed in pre-cut grooves between timber members to increase joint capacity and minimize bearing stress. Commonly used in glulam beams and trusses, these components provide long-term performance for high-load assemblies.
Malleable Iron Washers »
Malleable cast iron washers are thick, load-bearing washers designed for dock construction. Their wide bearing surface distributes load evenly and prevents embedment in softer wood species.
All Thread Rods »
Also known as fully threaded rods, these components are used for through-bolt and anchor assemblies or as general-purpose connectors in timber structures. Portland Bolt manufactures and stocks a wide selection of diameters, materials, and finishes.
Plates »
Our plasma table can produce anchor plates, washers and templates up to 1-1/2″ thick, with multiple holes, to match exact project blueprints and load requirements.
Anchor Bolts & Rods »
Anchor bolts and rods secure timber and steel to concrete foundations, ensuring strength and alignment from foundation to frame.
Why Timber Professionals Trust Portland Bolt
Dependable Lead Times and Production
Timber projects demand precise scheduling. With fully integrated U.S. facilities and extensive domestic inventory, Portland Bolt efficiently delivers both custom and large-scale orders—meeting deadlines without compromising quality.
Custom Capabilities for Complex Designs
From tie rod assemblies to oversized bolts, every part is built to precise specifications and tested for performance.
Expert Guidance and Engineering Support
Our team collaborates directly from drawings and specs to ensure proper fit, function, and finish. We provide submittals and technical guidance to help engineers and contractors streamline approvals and reduce field issues.
Precision & Performance
Our manufacturing tolerances are maintained through rigorous quality control, ensuring every fastener fits precisely and performs reliably in timber assemblies.
Domestic Quality and Full Traceability
Portland Bolt fasteners are U.S.-made with certified materials and complete digital traceability. Each component is inspected in-house to ensure precise performance and compliance.
The Structural Fastener Guide for Timber Construction
Understanding the Right Hardware for Wood and Mass Timber Projects
From glulam beams to hybrid timber-steel assemblies, choosing the right fasteners is critical to strength, safety, and aesthetics. This comprehensive guide covers the most common timber fasteners, connection hardware, and best practices for long-term structural performance.
Frequently Asked Questions
Have a question? Get expert guidance.
Don’t spend hours trying to work through specs and submittals on your own. Our knowledgeable representatives help timber professionals every day with bolt selection, coatings, and lead-time planning. Let us take the guesswork out of your project and make sure you get exactly what you need, on time.
PROJECT AT A GLANCE
Strength in Every Timber Connection.
From heavy timber trusses to modern mass-timber design, Portland Bolt delivers the dependable fasteners builders trust. We custom manufacture fasteners in the USA, inspecting and certifying each to meet project requirements. We also stock a range of standard, globally sourced products, ensuring builders have access to the right hardware when and where it’s needed. Contact our team to discuss your job requirements or request a quote.
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