Bulk 1-1/8"-7 Grade A Hex Bolts (A307, Coarse Thread, Hot-Dipped Galvanized)

Heavy-Duty Corrosion-Resistant Fasteners for Industrial & Structural Use

For high-strength, corrosion-resistant fastening, trust 1-1/8"-7 ASTM A307 Grade A Hex Bolts. Manufactured from low carbon steel with a Hot-Dipped Galvanized (HDG) finish, these bolts provide enhanced durability and protection against rust and corrosion. Perfect for outdoor, marine, infrastructure, and industrial applications, they ensure long-lasting performance in extreme environments.

Note – PT = Partial Thread

Key Specifications

• Material: Low carbon steel (ASTM A307 Grade A compliant)
• Tensile Strength: 60,000 psi minimum tensile strength
• Thread Size: 1-1/8"-7 Coarse Thread (UNC)
• Finish: Hot-Dipped Galvanized (HDG) for superior corrosion resistance
• Head Style: Standard hex head for easy wrench tightening
• Compliance: Fully meets ASTM A307 Grade A specifications

Why Choose Hot-Dipped Galvanized (HDG)?

The HDG process coats steel bolts in a thick, durable layer of zinc, offering enhanced protection against corrosion. This finish is particularly valuable in:

• Outdoor and Marine Applications: Provides superior rust resistance, making it ideal for bridges, docks, and marine environments.
• Infrastructure and Construction: Ensures long-lasting durability in structural projects exposed to moisture, weather, and chemicals.
• Industrial and Utility Installations: Prevents premature wear in power plants, water treatment facilities, and telecommunications projects.

Differences Between ASTM A307 Grade A & B

Understanding the differences between A307 Grade A and Grade B is crucial for selecting the right bolt for your project:

• Grade A: Designed for general-purpose applications, including construction, infrastructure, and industrial equipment fastening. These bolts have a minimum tensile strength of 60,000 psi and are widely used for everyday structural needs.
• Grade B: Specifically made for flanged joints in piping systems with cast iron flanges. These bolts have a slightly higher tensile range (60,000 to 100,000 psi) and require heavy hex heads for added strength.
• Why Choose Grade A for 1-1/8"-7 Hex Bolts? Grade A is ideal for securing structural elements, mounting heavy equipment, and general-purpose fastening. Its broad usability makes it the go-to choice for large-scale construction projects.

Benefits of ASTM A307 Grade A with HDG Finish

• Superior Corrosion Resistance: The HDG coating extends bolt life in high-moisture and salt-exposed environments.
• Reliable Performance: Manufactured with a minimum tensile strength of 60,000 psi, ensuring secure fastening in demanding applications.
• Versatile Construction Fastener: Commonly used in commercial buildings, bridges, and heavy equipment manufacturing.
• Standard Compatibility: Easily integrates with HDG nuts and washers, making replacement and installation simple.

Industries & Applications

• Structural Steel & Construction: Ideal for bolted connections in commercial buildings, bridges, and heavy-duty frameworks.
• Marine & Coastal Projects: Perfect for securing piers, docks, and waterfront structures.
• Utility & Infrastructure: Essential for power plants, water treatment facilities, and outdoor installations.
• Outdoor Industrial Equipment: Used in securing fencing, light poles, and communication towers.

Installation Tips

• Use the Right Wrench: Standard hex head bolts require an appropriately sized wrench or impact socket for installation.
• Torque Properly: Follow recommended torque guidelines to avoid over-tightening or under-tightening, ensuring optimal performance.
• Use HDG-Compatible Hardware: Always pair HDG bolts with matching HDG nuts and washers to maintain corrosion resistance.
• Store Properly: Keep bolts dry before installation to preserve the protective zinc layer.

Bulk Purchasing Advantages

• Cost Savings: Buying in bulk lowers the per-unit cost, making large projects more affordable.
• Consistent Quality: All bulk orders are sourced from the same production lot, ensuring uniform strength and reliability.
• Fast Availability: Large stock ensures quick fulfillment, keeping your project on schedule.
• Ideal for Contractors & Manufacturers: Whether you're assembling heavy machinery or working on a large-scale build, having a bulk supply reduces downtime.

Order in Bulk & Save

Upgrade your construction and industrial fastening with bulk 1-1/8"-7 ASTM A307 Grade A Hex Bolts. Perfect for structural connections, outdoor applications, and general fastening. Order now for bulk discounts, fast shipping, and expert customer service.

✔️ Best for industrial, structural, and marine projects

✔️ Coarse-thread UNC design for strong and secure fastening

✔️ ASTM A307 Grade A compliant with Hot-Dipped Galvanized finish