5/16"-18 Stainless Steel Hex Cap Bolts / Screws

Meets ASTM F593 and ASME B18.21 Standards – Grade A2 / 18-8 / 304 Stainless Steel

Upgrade your projects with our high-quality 5/16"-18 Stainless Steel Hex Cap Bolts / Screws. These bolts meet the ASTM F593 and ASME B18.21 quality standards and are marked as shown for easy identification. Made from Grade A2 / 18-8 / 304 stainless steel, they offer excellent corrosion resistance, making them ideal for marine, outdoor, and industrial applications.

Key Features

• Diameter: 5/16 inch
• Thread Size: 5/16"-18 (18 Threads Per Inch) – Coarse (Standard) Thread
• Length: Please select from the menu above
• 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: Stainless Steel Grade A2 / 18-8 / 304
• Specifications: Conforms to ASME B18.21 and ASTM F593

Material Properties

Our stainless steel hex cap bolts are manufactured from Grade A2 / 18-8 / 304 stainless steel, offering:

• Excellent Corrosion Resistance: Ideal for marine, outdoor, and harsh environments.
• Durability: Resistant to rust and oxidation for long-lasting performance.
• Non-Magnetic: Suitable for applications requiring non-magnetic fasteners.
• High Tensile Strength: Provides reliable fastening in structural applications.
• Easy Identification: Bolts are marked as shown for quick verification of specifications.

Ideal Applications

• Marine and Boating Projects
• Outdoor Structures and Decking
• Food and Beverage Equipment
• Chemical Processing Plants
• General Industrial and Construction Use

Why Choose These Hex Cap Bolts?

• High-Quality Material: Made from Grade A2 / 18-8 / 304 stainless steel for superior corrosion resistance.
• Standards Compliant: Meets ASTM F593 and ASME B18.21 specifications for quality and reliability.
• Easy Identification: Marked bolts allow for quick and accurate verification of grade and standards.
• Versatile Length Options: Available in various lengths with full or partial threading.
• Easy Installation: Standard hex head design allows for quick and secure fastening.
• Non-Magnetic Properties: Suitable for sensitive electronic applications.

Installation Tips

For optimal performance when installing stainless steel hex cap bolts:

• Use anti-seize lubricant to prevent galling during installation.
• Ensure threads are clean and free from debris.
• Pair with matching stainless steel nuts and washers to maintain corrosion resistance.

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

Order Yours Today

Enhance your projects with our 5/16"-18 Stainless Steel Hex Cap Bolts / Screws for reliable and corrosion-resistant fastening solutions. Perfect for a wide range of applications where quality and durability are paramount. Order now and benefit from fast shipping and exceptional customer service!

✔️ Trusted by professionals in marine, construction, and industrial sectors

✔️ High-quality stainless steel meeting ASTM F593 and ASME B18.21 standards

✔️ Excellent corrosion resistance for long-lasting performance