Choosing the right A325 fully threaded bolts is essential for strength, durability, and safety in structural connections. The following selections represent high-quality, heavy hex structural bolts in plain finish, meeting ASTM A325 requirements. This guide highlights key specifications, typical use cases, and practical considerations to help you compare options for framing, steel connections, and general construction applications.
| Product | Brand | Size | Finish | Pack Size |
|---|---|---|---|---|
| Conquest Fasteners 5/8″-11 x 1-1/2″ A325 Type 1 Fully Threaded Heavy Hex Structural Bolts | Conquest Fasteners | 5/8″ x 1-1/2″ | Plain | 10 Pack |
| Conquest Fasteners 3/4″-10 x 2″ A325 Type 1 Fully Threaded Heavy Hex Structural Bolts | Conquest Fasteners | 3/4″ x 2″ | Plain | 25 Pack |
| Conquest Fasteners 3/4″-10 x 3″ A325 Type 1 Fully Threaded Heavy Hex Structural Bolts | Conquest Fasteners | 3/4″ x 3″ | Plain | 25 Pack |
| Conquest Fasteners 3/4″-10 x 3″ A325 Type 1 Fully Threaded Heavy Hex Structural Bolts | Conquest Fasteners | 3/4″ x 3″ | Plain | 10 Pack |
| Conquest Fasteners 3/4″-10 x 1-3/4″ A325 Type 1 Fully Threaded Heavy Hex Structural Bolts | Conquest Fasteners | 3/4″ x 1-3/4″ | Plain | 25 Pack |
Product At A Glance
Below is a concise snapshot of the five highlighted A325 fully threaded heavy hex bolts, focusing on thread count, length, and packaging. These attributes influence application suitability, compatibility with nut and hole sizes, and installation efficiency in structural assemblies.
Conquest Fasteners 5/8″-11 x 1-1/2″ A325 Type 1 Fully Threaded Heavy Hex Structural Bolts

These heavy hex structural bolts meet ASTM A325 standards and provide a plain finish suitable for durable connections in load-bearing assemblies. Diameter is 5/8 inch with 11 threads per inch and a length of 1-1/2 inches. The 10-pack offers practical value for larger projects or multiple joints. The hex head simplifies driving and reduces the risk of thread damage during installation. Ideal for structural steel connections where high shear and tension resistance are required.
Conquest Fasteners 3/4″-10 x 2″ A325 Type 1 Fully Threaded Heavy Hex Structural Bolts

With a 3/4 inch diameter and 2 inch length, these A325 bolts feature 10 threads per inch and come in a 25-pack. The plain finish aids corrosion resistance in indoor or controlled environments and provides consistent performance for structural applications involving heavy-duty joints and plate connections. The heavier diameter improves load distribution and reduces the risk of bolt failure under dynamic loads.
Conquest Fasteners 3/4″-10 x 3″ A325 Type 1 Fully Threaded Heavy Hex Structural Bolts

The 3-inch length in a 3/4 inch diameter bolt provides extended engagement for thicker connections or deeper plates. At 10 threads per inch, these A325 bolts support robust structural ties in exterior or interior steel frameworks. The 25-pack adds efficiency for projects with multiple joints, reducing on-site procurement frequency. The plain finish helps resist surface corrosion with proper protective coatings when needed.
Conquest Fasteners 3/4″-10 x 3″ A325 Type 1 Fully Threaded Heavy Hex Structural Bolts

These 3-inch bolts are supplied in a 10-pack, featuring a 3/4 inch diameter and 10 threads per inch. They meet ASTM A325 standards and deliver reliable performance for structural connections where consistent bolt engagement is critical. The plain finish provides compatibility with standard nut-and-washer assemblies in many shop environments. Suitable for connections in heavy frame construction or beam-to-column joints where precise alignment is required.
Conquest Fasteners 3/4″-10 x 1-3/4″ A325 Type 1 Fully Threaded Heavy Hex Structural Bolts

With a 1-3/4 inch length, these bolts strike a balance between profile height and engagement depth for a variety of structural joints. The 3/4 inch diameter paired with 10 threads per inch aids in predictable torque and tensioning, while the 25-pack quantity supports larger construction tasks. Like the others, they adhere to ASTM A325 standards and feature a plain finish for straightforward integration into many steel assemblies.
Buying Guide: A325 Fully Threaded Bolts For Structural Connections
When selecting A325 fully threaded bolts, assess these key factors to ensure optimal performance and cost efficiency:
- Diameter and length: Choose 5/8″ to 3/4″ diameters for typical structural connections. Longer bolts increase engagement depth but may require precise hole alignment and washer size.
- Thread pitch: Common options include 11 and 10 TPI. Higher TPI offers finer engagement but may require tighter tolerances for accurate nut seating.
- Finish: Plain finishes are common for indoor or protected environments; additional coatings or zinc plating improve corrosion resistance in outdoor or humid settings.
- Standards: Ensure bolts meet ASTM A325 Type 1 requirements for heavy hex structural bolts designed for structural joints in steel frames.
- Packaging: Larger packs reduce reordering frequency and are often more economical for projects with many joints; smaller packs suit small-scale repairs.
- Compatibility: Confirm compatible nuts, washers, and plate thickness to achieve proper clamp up and joint integrity.
- Application environment: Consider exposure to moisture, salts, or chemicals, and choose bolts with appropriate corrosion resistance or protective finishes.
- installation method: Plan for torque values, lubrication, and potential need for thread lubricants to achieve consistent clamping force without galling.
For structural projects, verify that all components—bolts, nuts, and washers—are rated for the intended load and that installation follows applicable codes and engineering recommendations. While this guide highlights five strong options, always align your choice with the specific demands of your project, including joint type, load path, and environmental conditions.