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  • A563 Grade DH Hex Nut
    SKU: HNA563DH-12

    Conquest A563 Grade DH Heavy Hex Nuts

    Diameters
    1/2" 5/8" 3/4" 7/8" 1" 1-1/8" 1-1/4" 1-1/2"
    Finish
    Plain Hot Dip Galvanized, Wax, & Blue Dye
    • High-strength Use: Ideal for structural applications with A325 or A490 bolts, or where high strength is necessary.
    • For Use With: A325 structural hex bolts, A490 structural bolts, anchor bolts, Grade B7 threaded rod, A307 Grade B threaded rod.
    starting at
    $0.45
    Ships today when you order in the next 4 hours 59 minutes.
    starting at
    $0.45
    Ships today when you order in the next 4 hours 59 minutes.
  • Conquest Heavy Hex Nut - Plain Finish
    SKU: ABN12D

    Conquest Heavy Hex Nuts, A194 Grade 2H

    Diameters
    1/2" 5/8" 3/4" 7/8" 1" 1-1/4" 1-1/2"
    Finish
    Plain Hot Dip Galvanized
    • High-strength Use: Ideal for structural applications with A325 or A490 bolts, or where high strength is necessary.
    • For Use With: A325 Structural Hex Bolts, A490 Bolts, Grade B7 Threaded Rod.
    starting at
    $0.39
    Ships today when you order in the next 4 hours 59 minutes.
    starting at
    $0.39
    Ships today when you order in the next 4 hours 59 minutes.
  • A563 Grade A Hex Nuts
    SKU: HNA563A-14

    Conquest Hex Nuts - A563 Grade A

    Diameters
    1/4" 5/16" 3/8" 7/16" 1/2" 5/8" 3/4" 7/8" 1" 1-1/4" 1-1/2"
    Finish
    Plain Hot Dip Galvanized
    • General-Purpose Use: Ideal for general construction, low-strength bolting assemblies, light-duty machinary, or residential projects.
    • For Use With: Hex Bolts, A307 Threaded Rod, Grade 55 Threaded Rod, and General Purpose Threaded Rod.
    starting at
    $0.05
    Ships today when you order in the next 4 hours 59 minutes.
    starting at
    $0.05
    Ships today when you order in the next 4 hours 59 minutes.

Heavy Hex Nuts for High-Load Fastening Applications

Heavy hex nuts are made for demanding fastening jobs. With a wider and thicker profile than standard hex nuts, they’re built to handle high torque and heavy loads, perfect for structural steel, industrial machinery, transportation systems, and more.

Why Use Heavy Hex Nuts

  • Load-Bearing Strength: Larger size offers more surface contact, helping prevent thread stripping and improving clamp force.
  • Vibration Resistance: Ideal for bolted joints exposed to dynamic loads or movement.
  • Versatility: Trusted across construction, maintenance, and infrastructure industries.

Styles Available

  • Standard Heavy Hex Nuts: Bigger and stronger than regular hex nuts, used for high-strength bolted connections.
  • Jam Nuts: Thinner profile, great where space is limited or when used as a locknut.
  • Locking Nuts: Designed to resist loosening from vibration or motion.

Grades & Materials

Choose the right grade based on your application:

  • Grade A (ASTM A563): General-purpose fastening with low to medium carbon steel.
  • Grade 2H (ASTM A194): Heat-treated, high-strength nuts used in bridges and heavy construction.
  • Grade DH (ASTM A563): Higher strength than 2H, ideal for critical structural connections.
  • Grade C (ASTM A563): Quenched and tempered for strength and toughness in equipment applications.
  • Stainless Steel (304/316): Excellent corrosion resistance for marine, food-grade, or chemical use.

Need Help?

Not sure which heavy hex nut fits your project? Our team is here to help. Contact us for expert guidance, or browse related products like threaded rod and washers to complete your setup.

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