In construction, small components often make the biggest difference. Anchor bolts, though hidden beneath concrete or steel, are essential to the integrity and long-term stability of any structure.
They form the critical connection between a building and its foundation, transferring loads, resisting external forces, and helping the structure stay anchored — especially during high winds, seismic events, or other environmental stresses. When anchor bolts fail, the result can be structural shifting or even collapse.
That’s why selecting high-quality, precisely fabricated anchor bolts is so important. At Threadline, we manufacture anchor bolts that meet the strictest standards, helping your projects stay safe, secure, and compliant.
Here’s a breakdown of our most trusted anchor bolt types.
Double-Ended Studs
Double-ended studs feature threading on both ends, with a plain shank in the middle. They are widely used for structural steel connections, tensioning assemblies, and concrete embedment with exposed thread for future attachment.
- Fully or partially threaded to suit your needs
- Common in bridges, steel columns, and heavy equipment mounting
- Installed with nuts and washers on each end for load transfer
- Custom fabricated to length, diameter, and finish requirements
Bent Anchor Bolts
Our bent anchor bolts are designed for concrete embedment and customized for specific load conditions and configurations.
L-Bend Anchor Bolts
- Bent at 90° for solid anchorage in concrete
- Commonly used to anchor sill plates and base plates
Custom Bent Bolts
- Fabricated to unique customer specs (e.g., 22° bends)
- Ideal for specialized foundation applications
Eye Bolts
- Round eye at one end (formed or welded) for attachment of chains, rods, or hooks
- Used in both structural and rigging applications
Hook Bolts
- Hooked end with thread on the opposite side
- Provides a secure, easy-to-install anchor point
J-Bolt Anchors & Rounded Bolts
- J-shaped anchor bolts for embedment in concrete
- Frequently used in highway and bridge construction
Round or Square U-Bolts
- U-shaped with threaded ends
- Ideal for fastening pipes, conduit, or round materials to structural supports
- Formed to fit around specific diameters of round piping
- Used in plumbing, HVAC, and mechanical applications
Headed Bolts
Threadline offers a full selection of headed bolts engineered for load-bearing, structural connections.
A325 Structural Bolts
- Heavy hex bolts for steel-to-steel structural joints
- Available with plain or galvanized finish and various strength grades
Tension Control Bolts
- Integrated spline ensures precise tension during installation
- Requires specialized electric shear wrench
- Common in high-strength steel connections
Carriage Bolts / Carriage Anchors
- Domed head with square neck to prevent spin during tightening
- Ideal for wood framing or square-holed steel components
Hex Head Bolts
- Six-sided head, industry standard for structural and mechanical fastening
- Available in multiple finishes and strength grades
Lag Screws / Lag Bolts
- Large-diameter fasteners for wood or lag-shield anchors
- Zinc or HDG coated for corrosion resistance
Socket Head Bolts
- Low-profile hex insert design, used with Allen keys or drivers
- Often used where flush mounting or clearance is important
Deco-Type Anchor Bolts
Deco-type anchor bolts are heavy-duty, embedded anchor bolts designed for industrial and equipment applications.
- Ideal for anchoring machinery bases, steel columns, and equipment pads
- Typically embedded in concrete with threaded ends for base plate connections
- Designed to withstand dynamic loads and vibration
- Custom configurations available for unique installation layouts or load requirements
Why Choose Threadline?
All our anchor bolts are fabricated in-house at our Charlotte, NC facility using U.S.-sourced steel, ensuring quality, traceability, and compliance with Buy America(n) and DOT project requirements. We offer standard sizes and fast turnaround on custom orders — often in as little as 2–3 days.
Whether you’re working on commercial construction, government-funded infrastructure, or heavy industrial installations, Threadline has the anchor bolt solutions to match.Contact our team today to get started on your next project or to request a quote.