This comprehensive guide aims to assist construction professionals, business owners, and engineers in making informed decisions when selecting anchor bolts for various projects.
Key Considerations
1. Load Requirements
Before choosing an anchor bolt, it’s critical to understand what forces it must resist. Consider:
- Tensile, shear, and combined loads
- Vibration or dynamic forces
- Safety factors and design codes (consulting a structural engineer is highly recommended)
Bolt selection must match both the expected load and the code requirements for your region or project type (such as DOT, AISC, or ASTM standards).
2. Substrate Type and Environmental Conditions
The material the anchor bolt will be embedded into — and the surrounding environmental factors — play a major role in performance.
- Concrete, brick, block, stone, or CMU all require different anchoring approaches.
- Corrosive environments, moisture, freeze/thaw cycles, and chemical exposure can all affect bolt longevity and coating selection.
Threadline’s Anchor Bolt Solutions
At Threadline, we manufacture and supply a wide range of anchor bolts to suit every application — from light-duty construction to heavy industrial foundations. Here’s a breakdown of our most popular options:
Deco-Type Anchor Bolts
- Heavy-duty, adjustable anchor bolt ideal for machinery and equipment bases
- Includes leveling nut for precise installation and load locking
- Designed to handle dynamic loads and vibrations
L-Bend Anchor Bolts
- 90° bend for secure embedment in concrete
- Commonly used to fasten sill plates or structural steel to foundations
Hook Bolts
- Bent into a hook on one end, threaded on the other
- Often used for temporary anchoring or light-duty embedded applications
J-Bolt Anchors/Rounded Bolts
- J-shaped bolts offer reliable embedment and pull-out resistance
- Common in highway, infrastructure, and foundation applications
Custom Bent Bolts
- Fabricated to exact specs (angle, length, diameter)
- Often used in custom applications and include tack-welded heads or special bends (e.g., 22°)
Eye Bolts
- One end forms a loop (welded or formed) to attach cables, rods, or hooks
- Other end is threaded for secure fastening
Round U-Bolts
- “U”-shaped with threaded ends
- Designed for fastening round objects like pipes or conduit to flat surfaces
Threadline’s Structural Bolts & Fasteners
A325 Structural Bolts
- Heavy hex bolts for steel-to-steel structural connections
- Available in domestic and import options
- Diameters: ½″ to 1½″; Lengths: 1¼″ to 12″
- Offered in plain and hot-dip galvanized finishes
Tension Control Bolts
- Pre-assembled with bolt, nut, and washer
- Spline end allows accurate tension control with shear wrench
- Ideal for high-strength steel framing
Carriage Bolts/Carriage Anchors
- Domed head with square neck prevents turning
- Common in wood framing or square-holed metal applications
Hex Head Bolts
- Industry-standard six-sided heads
- Available in plain, zinc, or HDG finishes
- Sizes: ½″ to 1½″ in diameter; Lengths: 1″ to 12″
Lag Screws/Lag Bolts
- Heavy-duty threaded fasteners for wood or concrete
- Typically zinc- or HDG-coated for corrosion resistance
Socket Head Bolts
- Cylindrical head with internal hex socket
- Full-thread design provides maximum engagement
- Used in tight-clearance or flush-mount applications
Threadline’s Anchor Rod & Stud Options
Single-Ended Studs
- Threaded on one end only
- Ideal for embedding in concrete and attaching structural components on top
Double-Ended Studs
- Threaded on both ends for flexibility in fastening and embedment
- Often used with nuts, washers, and plate steel
- Available in custom diameters, lengths, and configurations
All Thread Rods
- Fully threaded along entire length for maximum flexibility
- Common in concrete anchoring, bracing, and general-purpose fastening
- Can be cut to length and used with washers and nuts for adjustable installs
Get It Right — Every Time
Choosing the correct anchor bolt isn’t just about hardware — it’s about project performance and safety. From foundation stability to structural integrity, your fasteners matter. Consider your load requirements, installation environment, and material compatibility, and don’t hesitate to consult an expert if you’re unsure.
At Threadline, we’re more than a fabricator — we’re your partner. Our team is here to help you get the right anchor bolts, fast — including custom orders, short lead times, and full compliance with Buy America(n) and DBE requirements.Let’s get started. Contact us today to quote your anchor bolt package or talk through your project’s unique needs.