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SKU: HBG8BPO-58X234
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Conquest 5/8" x 2-3/4" Grade 8 Indented Flange Bolt - Plain

Diameters

1/4" 5/16" 3/8" 7/16" 1/2" 5/8" 3/4"

Lengths

1/2" 5/8" 3/4" 1" 1-1/4" 1-1/2" 1-3/4" 2" 2-1/4" 2-1/2" 2-3/4" 3" 3-1/4" 3-1/2" 3-3/4" 4" 4-1/2" 5" 5-1/2" 6"
$409
Ships Nov 11 when you order now

Description

5/8" x 2-3/4" 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

Specifications
Diameter: 5/8"
Length: 2-3/4"
Thread Length: 2.273"
Thread Type: Coarse
Threads Per Inch: 11
Head Type: Hex Head
Material: Alloy Steel
Finish: Plain
Type: Grade 8
Product Weight: 0.3 lbs.
Manufacturer Name: Conquest Fasteners
Quantity: 1 Bolt
Additional Info: • SAE J429
• X9- ASTM Equivalent: A354 Grade BD

Reviews
(12)

Customer Reviews

Based on 12 reviews
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(12)
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M
Mark Henderson
Flange bolts are great

I use flange bolts for almost every application. The additional clamping power and not digging into softer metals.

D
Dusty Chavis
Fast and easy

Well, this is the first time I really has ever ordered boats online and it was such an easy process through this company that I wouldn’t go. Any anywhere else to purchase anything but right here. Thank you for such a well organized and customer oriented company.

t
todd sykes

Great prices! My go to place for bolts etc.

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Our Iowa-based 23,000 square foot manufacturing facility was carefully crafted for the high quality, custom production of tie-down straps and chains, lifting slings, cargo nets, and more. Your vision brought to life.

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