5/8″ x 3-1/4″ Conquest Grade 8 Indented Flange Bolt

When pairing a nut with a hex bolt, the material and finish must match. If these do not match, the nut will not fit the bolt.

The 5/8″ Conquest Grade 8 Indented Flange Bolt is engineered for the highest performance in critical load-bearing applications. Manufactured from high-tensile alloy steel and designed with a built-in indented flange, it eliminates the need for a washer while distributing the load evenly, ensuring fast, reliable installations with reduced hardware.

Flange Bolts for Automotive Frame Assembly and More

This bolt is ideal for use in industrial, automotive, and heavy equipment settings. Its plain finish is optimized for controlled environments where corrosion is not a concern, offering a budget-friendly solution without compromising strength.

Key Features

• Grade 8 Alloy Steel: Rated for high-stress, heavy-load performance in demanding applications.
• Indented Flange Head: Functions like an integrated washer to enhance load distribution and minimize surface damage.
• Plain Finish: Ideal for indoor or dry environments where coatings are not required.
• Coarse Thread (11 TPI): Standard for secure hold and compatibility with common tapping tools and fasteners.
• Precision Machined Threads: Ensures consistent grip and alignment under high torque.

Common Applications

• Structural steel bolting in commercial and industrial construction
• Assembly and maintenance of agricultural and heavy-duty machinery
• Automotive frame, suspension, and chassis installations
• Industrial machinery builds and repairs requiring high-strength fastening
• OEM hardware replacement in equipment where tensile reliability is critical

Installation Tips

• Always use with matching Grade 8 nuts to maintain load capacity and thread compatibility
• Torque to spec per ASTM A354 or SAE J429 guidelines to prevent thread damage or bolt failure
• Inspect threads before installation; clean and align properly to ensure smooth engagement
• Do not overtighten, built-in flange provides proper load distribution without additional washers
• Use in dry, protected environments to maximize bolt lifespan with plain finish

California Residents: WARNING

The Conquest Grade 8 Indented Flange Bolt is built for jobs where failure isnt an option. Engineered for maximum tensile strength and durability, this bolt is a go-to solution across high-load applications in construction, manufacturing, and heavy equipment maintenance. Whether you’re fastening structural steel, securing large assemblies, or replacing OEM hardware, these flange bolts bring the heat, no washers needed.

Manufactured from premium-grade alloy steel and designed with a built-in indented flange, each bolt distributes load more evenly while minimizing surface damage. That means fewer parts, faster installs, and less hassle. The plain finish keeps it cost-effective for interior and controlled environments where corrosion isnt a primary concern.

Available in multiple diameters and lengths, this bolt line is built to match your specs and your schedule.

Key Features:

• Grade 8 Alloy Steel: Delivers high tensile strength and load resistance for demanding applications.
• Indented Flange Head: Acts like a built-in washer, spreading load evenly and reducing the need for extra hardware.
• Plain Finish: Ideal for indoor or low-exposure environments where coating isnt required.
• Threaded Shank Options: Choose from a variety of lengths and diameters to match your projects needs.
• Precision Machined Threads: For smooth engagement and secure clamping force.

Common Applications:

• Structural steel connections
• Agricultural and heavy-duty equipment
• Automotive frame assembly
• Industrial machinery repair
• OEM part replacement

Installation Tips:

• Use with matching Grade 8 nuts for optimal strength.
• Torque according to ASTM A354 or SAE J429 specs to avoid over-tightening.
• Ensure threads are clean and properly aligned to prevent stripping.

Explore available sizes and finishes to find the perfect fit for your next job.

California Residents: WARNING