Bulk 7/8″-9 Grade A Hex Bolts (A307, Coarse Thread, Hot-Dipped Galvanized)
$74.56 – $201.32
Bulk 7/8″-9 Grade A Hex Bolts (A307, Coarse Thread, Hot-Dipped Galvanized)
Bulk 7/8″-9 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 7/8″-9 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.
Ideal 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: 7/8″-9 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 7/8″-9 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 7/8″-9 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
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Shipping and Return Policy
| Length |
10 QTY – 7/8"-9 x 24" (6" THD) ,14 QTY – 7/8"-9 x 28" (6" THD) ,40 QTY – 7/8"-9 x 10" (PT) ,35 QTY – 7/8"-9 x 6-1/2" (PT) ,20 QTY – 7/8"-9 x 11" (PT) ,10 QTY – 7/8"-9 x 26" ((6" THD)) Under-Sized ,25 QTY – 7/8"-9 x 12" (PT) ,30 QTY – 7/8"-9 x 12" (6" THD) ,12 QTY – 7/8"-9 x 32" (6" THD) ,20 QTY – 7/8"-9 x 9" (PT) ,45 QTY – 7/8"-9 x 5-1/2" (PT) ,25 QTY – 7/8"-9 x 8-1/2" (PT) ,25 QTY – 7/8"-9 x 8" (PT) ,60 QTY – 7/8"-9 x 3-1/4" (PT) ,10 QTY – 7/8"-9 x 26" (6" THD) ,30 QTY – 7/8"-9 x 7-1/2" (PT) ,45 QTY – 7/8"-9 x 7" (PT) ,20 QTY – 7/8"-9 x 14" (6" THD) ,20 QTY – 7/8"-9 x 16" (6" THD) ,25 QTY – 7/8"-9 x 9-1/2" (PT) ,15 QTY – 7/8"-9 x 20" (6" THD) ,50 QTY – 7/8"-9 x 5" (PT) ,14 QTY – 7/8"-9 x 30" (6" THD) ,45 QTY – 7/8"-9 x 6" (PT) ,14 QTY – 7/8"-9 x 18" (6" THD) ,10 QTY – 7/8"-9 x 36" (6" THD) ,90 QTY – 7/8"-9 x 1-3/4" ,60 QTY – 7/8"-9 x 4" (PT) ,140 QTY – 7/8"-9 x 1-1/2" ,60 QTY – 7/8"-9 x 4-1/2" (PT) ,15 QTY – 7/8"-9 x 22" (6" THD) ,120 QTY – 7/8"-9 x 2" ,15 QTY – 7/8"-9 x 24" ((6" THD)) Under-Sized ,105 QTY – 7/8"-9 x 2-1/2" ,50 QTY – 7/8"-9 x 3-3/4" (PT) ,70 QTY – 7/8"-9 x 3-1/2" (PT) ,40 QTY – 7/8"-9 x 10" (6" THD) ,90 QTY – 7/8"-9 x 3" (PT) ,65 QTY – 7/8"-9 x 2-3/4" |
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