Built for Performance in Highway Applications

All Portland Bolt fasteners are produced across our four U.S. manufacturing facilities totaling more than 270,000 square feet of production space, where forging, threading, testing, and galvanizing are performed in-house for total quality and traceability. Our U.S.-made steel inventory spans diameters from 1/2″ to 3-1/2″ and multiple material grades, ensuring compliance with DOT and federal procurement standards, including the Buy American Act and Build America, Buy America (BABA) provisions. The result is consistent strength, reliability, and performance in critical infrastructure applications.

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America’s infrastructure is built on strength, precision, and trust.

For decades, Portland Bolt has been a cornerstone in that foundation – manufacturing 100% domestic, fully traceable fasteners for the nation’s highways and bridges.

With 4 manufacturing facilities across the United States totaling more than 270,000 square feet of production space, Portland Bolt delivers the capacity and reach to support major infrastructure projects nationwide.

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 full control over quality, traceability, and lead times.

All fasteners meet ASTM, SAE, and AASHTO specifications, ensuring compliance with every DOT standard and Build America, Buy America provision.

From bridge anchor systems and guardrail bolts to tie rods and barrier pins, Portland Bolt fasteners are built for performance in the toughest environments.

They support the structures that keep America moving – safely, reliably, and for generations to come.

At Portland Bolt, every product is more than steel – it’s a promise of quality, integrity, and American craftsmanship.

For your next highway or bridge project, contact Portland Bolt.

Commonly Used Products

Barrier Pins

Barrier Pins »

Barrier pins are used to connect precast concrete barriers and anchor barriers to the roadway. Portland Bolt manufactures these pins in various configurations and finishes to meet individual state DOT specifications.

Barrier Pins →

Hex Bolts

Hex Bolts »

Hex head bolts are among the most widely used fasteners in construction. We produce hex bolts up to 2-1/2 inches in diameter in multiple ASTM grades, with domestic nuts and washers available for complete assemblies.

Hex Bolts →

Structural Bolts

Structural Bolts »

Heavy hex structural bolts meet ASTM F3125 Grades A325 and A490 and are designed for high-strength steel connections. Diameters range from 1/2 inch to 1-1/2 inches, suitable for bridges, overpasses, and structural steel applications.

Structural Bolts →

Anchor Rods

Anchor Rods »

Anchor rods are available in numerous configurations and grades to secure columns, poles, and structural supports to concrete foundations. We produce custom assemblies complete with washers, nuts, and templates.

Anchor Rods →

90° Anchor Bolts

90° Anchor Bolts »

Right-angle bend anchor bolts are a standard solution for connecting steel to concrete. They are manufactured to project specifications and hot-dip galvanized in-house for long-term corrosion protection.

90° Anchor Bolts” →

Tie Rods

Tie Rods »

Tie rod assemblies provide bracing in large structural systems, including bridge installations. Assemblies can include turnbuckles, clevises, and threaded rods, all machined and finished in-house for precise fit and alignment.

Tie Rods →

Round U-Bolts

Round U-Bolts »

Custom round bend U-bolts are available from 1/2 inch to 4 inches in diameter, produced to virtually any ASTM specification. They are used in roadway supports, pole mounting, and pipe hanging applications.

Round U-Bolts →

Plates

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.

Plates →

Guardrail Bolts

Guardrail Bolts »

Guardrail bolts are engineered for roadside safety systems and manufactured to ASTM A307 Grade A. Each bolt meets the strength and mechanical requirements outlined by federal and state specifications.

Guardrail Bolts →

Double Recessed Nuts

Double Recessed Nuts »

ASTM A563 Grade A double recessed hex nuts (DR nuts) are designed for use in guardrail and post bolt assemblies. Portland Bolt supplies these specialized nuts for highway safety and guardrail applications.

Double Recessed Nuts →

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Have a question? Get expert guidance.

Don’t spend hours trying to work through specs and submittals on your own. Our experts help highway contractors every day with bolt selection, coatings, and scheduling so your road, bridge or guardrail build stays on time and on spec. Let us take the guesswork out of your project so you get the exact parts you need, when you need them.

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Why Highway Contractors Choose Portland Bolt

DOT-Approved and Specification-Compliant Icon

DOT-Approved and Specification-Compliant

Portland Bolt manufactures fasteners that meet stringent ASTM, SAE, and AASHTO standards for bridge and highway construction. Our team works closely with DOT agencies nationwide to ensure every product meets federal and state compliance requirements.

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Unmatched Manufacturing Capacity

With extensive domestic steel inventory and a vertically integrated process, Portland Bolt can respond quickly to large-scale and time-sensitive projects. Our in-house production and galvanizing capabilities ensure consistent lead times, dependable quality, and exceptional accuracy across every product.

Engineering and Submittal Support Icon

Engineering and Submittal Support

Our specialists assist with AASHTO-to-ASTM conversions, submittal documentation, and material substitutions. We collaborate with contractors, engineers, and inspectors to ensure every fastener is built to spec and ready for inspection.

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Certifications & Traceability

Digital certification packages and full domestic traceability provide confidence for government-funded and large-scale projects.

Fabrication Calculators

Calculators & Tools

Accurate specifications are critical in highway and bridge construction. Portland Bolt provides a suite of online calculators to support engineers, contractors, and project managers working on guardrails, sign structures, and concrete anchors. From estimating plate weights to calculating bolt loads and anchor rod lengths, these tools help you plan efficiently, meet DOT requirements, and keep every project moving safely and on schedule.

Checkout our Tools & Resources

Frequently Asked Questions

Yes. Portland Bolt is an approved manufacturer and supplier for numerous State DOTs across the United States. Our products are manufactured to meet ASTM, SAE, and AASHTO standards, ensuring compliance with state and federal specifications for structural integrity, performance, and traceability.
AASHTO specifications are developed specifically for transportation infrastructure projects, while ASTM standards cover a broader range of industrial applications. Many AASHTO standards directly reference or align with ASTM equivalents. Portland Bolt provides a detailed AASHTO-to-ASTM cross-reference chart and technical guidance to ensure all products meet the correct specification for your project.
Yes. Portland Bolt manufactures fasteners that can meet Buy America and Buy American requirements when specified. For qualifying projects, fasteners are produced using domestic steel and manufactured within Portland Bolt’s U.S. facilities, with full material traceability and required certification documentation provided to support compliance with applicable federal and transportation funding provisions.
Our products are commonly used in bridge construction, guardrail and barrier systems, retaining walls, overhead sign and lighting structures, traffic signal foundations, and other critical roadway infrastructure. Each fastener is engineered for strength, corrosion resistance, and long-term structural performance under dynamic loading conditions.
Absolutely. We regularly manufacture custom anchor assemblies, tie rods, and plate components to match state-specific drawings and dimensions. Our in-house forging, machining, and galvanizing capabilities enable precise fabrication and rapid turnaround for unique design requirements.
We conduct mechanical testing, hardness testing, and rotational capacity testing in accordance with ASTM and AASHTO requirements. These tests verify tensile strength, ductility, and coating integrity to ensure every fastener meets or exceeds the required mechanical performance standards for highway structures.
Most highway products are hot-dip galvanized in our in-house facilities for superior corrosion protection. This process ensures uniform coating thickness and long-term durability, even in harsh weather and de-icing conditions common in transportation infrastructure applications.
Yes. Each shipment includes a complete certification package with mill test reports, coating certifications, and dimensional verification. We also provide state-specific submittal documentation and can work directly with engineers or DOT representatives to ensure compliance before fabrication.
Lead times for large or custom highway orders are driven by customer delivery requirements and project specifications. Portland Bolt manages key manufacturing processes in-house, allowing us to align production schedules with required delivery timelines and maintain reliable turnaround for complex assemblies or large-volume orders. Final lead times vary based on order scope, specifications, and delivery needs.Because all operations, from raw-steel inventory to galvanizing, are handled in-house, Portland Bolt can maintain reliable lead times even for complex assemblies or large-volume orders. Exact turnaround depends on project size and specification requirements, but our integrated process minimizes delays associated with outsourcing.
Frequently used items include barrier pins, structural bolts, guardrail bolts, anchor rods, swedged anchor rods, 90° anchor bolts, tie rods, round U-bolts, and double-recessed nuts. Portland Bolt manufactures each to the required ASTM or AASHTO standard with accompanying nuts, washers, and coatings.
Yes. You can submit drawings, specifications, or quantity requirements directly through our website’s RFQ form or by contacting our sales team. Our estimators will review your documentation and provide a detailed quote and lead-time estimate.
Unlike distributors, Portland Bolt is a fully integrated manufacturer with in-house forging, machining, threading, and galvanizing operations. This structure ensures unmatched quality control, complete material traceability, and faster delivery, making us a trusted source for mission-critical highway and bridge hardware nationwide.
Port Mann HighwayPROJECT AT A GLANCE

Port Mann Highway

PRODUCTS USED:

Portland Bolt supplied galvanized 1-1/2” diameter A449 all-thread rod with nuts and washers—manufactured entirely in the United States—to meet the project’s North American sourcing requirements. The high-strength all-thread rod was used in bridge bearings for the Port Mann Bridge, which spans the Fraser River in Surrey, British Columbia.

Due to the critical nature of the application, Portland Bolt was selected for its ability to deliver domestically produced, high-quality fasteners on schedule. As a trusted supplier to projects across Canada and around the world, Portland Bolt was proud to contribute to the construction of this landmark bridge that continues to serve millions of travelers.

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Port Mann Highway