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SKU: HBA-516X312
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Conquest 5/16" x 3-1/2" A307 Grade A Hex Bolt - Plain

Regular price $036
Ships Nov 12 when you order now

Description

5/16" x 3-1/2" Conquest A307 Grade A Hex Bolt with Plain Finish

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.

These 5/16" diameter Conquest A307 Grade A Hex Bolts are designed for general-purpose fastening in dry, non-corrosive environments. With coarse threads at 18 TPI, a hex head design, and a plain finish, they provide consistent strength and ease of installation for indoor structural work and maintenance tasks.

5/16" Hex Bolts for Indoor Structural Fastening

Manufactured to ASTM A307 Grade A specifications and built from low carbon steel, these bolts are suitable for non-critical structural applications in framing, machinery setup, and everyday construction. Their SAE-standard sizing makes them compatible with common tools and jobsite practices.

Key Features

  • 5/16" Diameter Carbon Steel: Delivers moderate strength for general-purpose structural fastening.
  • Plain Finish: Best suited for indoor or low-corrosion environments where coating is not required.
  • 18 TPI Coarse Threads: Provides solid engagement and easy installation into wood or mild steel.
  • ASTM A307 Grade A Compliant: Built to standard specifications for structural-grade fasteners.
  • Standard SAE Measuring System: Compatible with widely used tools and construction specs.
  • Hex Head Design: Installs efficiently with sockets or hand wrenches.
  • Flexible Use: Ideal for light structural framing, equipment mounting, and general indoor repairs.

Common Applications

  • Light-duty framing in residential or commercial settings
  • Mounting equipment or brackets indoors
  • Wood-to-wood connections in interior carpentry
  • Joining wood to steel supports in non-corrosive environments
  • Routine maintenance and fixture installations

Installation Tips

  • Always pair with plain finish hex nuts and washers to ensure proper fit and performance
  • Use standard wrenches or impact tools for efficient tightening in wood or metal substrates
  • Avoid use in wet or corrosive environments unless a protective coating is applied after installation

California Residents: WARNING

Specifications

Diameter: 5/16"
Length: 3-1/2"
Thread Length: 7/8" Min.
Thread Type: Coarse
Threads Per Inch: 18
Head Type: Hex Head
Material: Carbon Steel
Finish: Plain
Type: A307 Grade A
Product Weight: 0.08 lbs.
Measuring System: Standard SAE
Manufacturer Name: Conquest Fasteners
Quantity: 1 Bolt

Reviews
(2)

Customer Reviews

Based on 2 reviews
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J
Jeffery Gaiters II
Absolutely a mechanics best friend

Easiest bolt service I’ve seen the bolts showed up the next day I cried tears of joy dang near.i will be coming back for more

C
C Crain
7" Bolts

Was as advertised and received item in a timely manner. Would buy from Fasteners Plus again.

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1-2 day shipping

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Our multiple distribution centers allow us to reach nearly 80% of the U.S. within 1-2 business days for all in-stock items. With thousands of items in stock & ready to ship, orders placed before 4:00pm CST ship out the same day.

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As employee-owners, we take customer service very seriously. Our team members are dedicated, professionally-trained, and have decades of combined experience serving the industry. Always speak with a real person and never wait more than 1 business day.

Manufactured in Iowa Headquarters

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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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