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SKU: HNA563A-516

Conquest 5/16"-18 Heavy Hex Nut, A563 Grade A - Plain Finish

Conquest 5/16"-18 Heavy Hex Nut, A563 Grade A - Plain Finish!

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SKU: HNA563A-516

Conquest 5/16"-18 Heavy Hex Nut, A563 Grade A - Plain Finish

$0.08
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Specifications

Diameter: 5/16"
Thickness: Basic: 19/64" Max: 0.314" Min: 0.280"
Thread Type: Coarse
Threads Per Inch: 18
Wrench Size: 9/16"
Material: Carbon Steel
Finish: Plain
Type: A563 Grade A
Manufacturer Name: Conquest Fasteners
Quantity: 1
Description

5/16"-18 Conquest Heavy Hex Nut, A563 Grade A – Plain Finish

The 5/16"-18 Conquest Heavy Hex Nut is a durable carbon steel fastener designed for general-purpose use in residential, commercial, and industrial settings. Manufactured to ASTM A563 Grade A standards, this nut offers strength, affordability, and compatibility for a wide range of threaded assemblies.

Heavy Hex Nut for General Construction and Light-Duty Framing

Featuring coarse 18 TPI threading and a robust hex profile, this 5/16" nut provides better load distribution than standard hex nuts. Ideal for welding, framing, bracing, or bolting with A307 or Grade 55 threaded rod, it’s a staple for light structural assemblies and maintenance tasks. The plain finish offers weldability and cost efficiency in controlled environments.

Key Features

  • Material: Carbon steel with a plain finish for general-purpose fastening.
  • Thread Type/TPI: Coarse thread with 18 threads per inch (TPI).
  • Heavy Hex Design: Larger contact area enhances clamping force and wrench fit.
  • Finish: Plain (uncoated) surface for weldable or interior applications.
  • Standard Compliance: Meets ASTM A563 Grade A specifications.

Applications

  • Light-duty framing or anchoring
  • Machinery bracing and support
  • Residential construction and remodeling
  • DIY metalwork and bolt-on assemblies
  • General fabrication or maintenance

Installation Tips

  • Match with 5/16"-18 bolts or threaded rod for proper fit.
  • Apply even torque using a hex socket or wrench.
  • Clean threads before use for best engagement and weld results.

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California Residents: WARNING

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× WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects and other reproductive harm. For more information visit: www.P65Warnings.ca.gov.

Customer Reviews

Based on 16 reviews
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A
Anthony Rizzo
Quality, delivery, prices excellent

I recently ordered some nuts, bolts, washers, screws, and ties for a pergola build. Their selection was great, product descriptions thorough, and delivery, and price excellent compared to other online stores and big-box stores. Will be buying from them in the future.

R
Rick Ugale
Nuts

Exactly as described, no problems

C
Customer
Great Service!

Great selection of fastners and great information about them and which one to choose for your application. Fast shipping as well.