5/16"-18 Grade 8 Hex Cap Bolts / Screws

Heavy-Duty Alloy Steel with Black Oxide Finish

Upgrade your projects with our premium 5/16"-18 Grade 8 Hex Cap Bolts / Screws. Made from heavy-duty Grade 8 alloy steel with a black oxide finish, these bolts offer exceptional strength and moderate corrosion resistance, making them ideal for high-stress applications. Available in various lengths to suit your specific needs.

Key Features

• Diameter: 5/16 inch
• Thread Size: 5/16"-18 (18 Threads Per Inch) – Coarse (Standard) Thread
• Thread Length:
  • Fully threaded up to 1-1/4 inch
  • Partially threaded beyond 1-1/4 inch (PT)
• Wrench Size (Across Flats): 1/2 inch
• Type: Hex Cap Bolt / Screw
• Matching Nuts & Washers: 5/16"-18 Nuts & Washers Available Here
• System of Measurement: Inch (Imperial / US)
• Material: Grade 8 Alloy Steel with Black Oxide Finish
• Specifications: Conforms to ASTM B18.2.1

Material Properties

Our Grade 8 hex cap bolts are manufactured from high-strength alloy steel and feature a black oxide finish, offering:

• Exceptional Strength: Ideal for heavy-duty applications requiring high tensile strength.
• Moderate Corrosion Resistance: Black oxide provides a basic level of corrosion protection and an attractive finish.
• Durability: Designed to withstand high stress and extreme conditions.
• High Hardness: Suitable for demanding mechanical applications.

Ideal Applications

• Automotive and Engine Assembly
• Heavy Machinery and Equipment
• Industrial and Construction Projects
• Agricultural Equipment
• Structural Steel Fabrication

Why Choose These Hex Cap Bolts?

• High-Quality Material: Made from Grade 8 alloy steel for superior strength.
• Versatile Length Options: Available in various lengths to meet your project requirements.
• Reliable Performance: Ideal for applications where failure is not an option.
• Easy Installation: Standard hex head design allows for quick and secure fastening.
• Attractive Finish: Black oxide provides a sleek appearance for visible installations.
• Standards Compliant: Manufactured to ASTM B18.2.1 specifications for quality assurance.

Installation Tips

For optimal performance when installing Grade 8 hex cap bolts:

• Ensure threads are clean and free from debris before installation.
• Use a torque wrench to apply the correct torque specifications for your application.
• Pair with matching Grade 8 nuts and washers for maximum strength and reliability.

Note: Matching nuts and washers are available for purchase separately.

Order Yours Today

Equip your projects with our 5/16"-18 Grade 8 Hex Cap Bolts / Screws for unmatched strength and durability. Perfect for high-stress applications where reliability is crucial. Order now and benefit from fast shipping and exceptional customer service!

✔️ Trusted by professionals in automotive and construction industries

✔️ High-strength Grade 8 alloy steel with black oxide finish

✔️ Compliant with ASTM B18.2.1 standards