Heavy-duty applications demand reliable and high-strength fastening solutions, and that’s exactly what ASME B18.2.2 heavy hex nuts deliver. Manufactured to meet strict ASME specifications, these industrial hex nuts offer superior load-bearing capabilities and long-term performance in even the most demanding environments.

At Bigboltnut, we specialize in the production and export of ASME B18.2.2-compliant heavy hex nuts in a wide range of sizes and materials to meet global industrial standards. Whether you're working on infrastructure projects, machinery, or structural frameworks, our nuts ensure secure, high-strength connections.

What is ASME B18.2.2?

The ASME B18.2.2 standard defines the dimensional and mechanical properties for hex nuts used in structural and industrial applications. These nuts feature a heavier, thicker profile compared to standard hex nuts, allowing for improved grip, increased contact surface, and better load distribution. ASME B18.2.2 is widely recognized and often used interchangeably with the ANSI standard for industrial hex nuts.

Available Sizes: Metric & Inch

ASME B18.2.2 heavy hex nuts are manufactured in both metric (MM) and imperial (inch) units. Their enhanced geometry makes them ideal for high-performance fastening systems that require durability, strength, and consistency.

Grades & Material Options                   

Selecting the right grade of heavy hex nut is crucial for performance and longevity. We offer a variety of material and grade options to suit specific applications:

• ASTM A563 (Grades A, B, C, DH) – For general and high-strength applications
• ASTM A194 (Grades 2H, 2HM, 4, 7, 8, 8M) – Ideal for high-temperature and high-pressure environments
• Carbon & Alloy Steel – Preferred in structural and industrial settings
• Stainless Steel (A2, A4) – Provides excellent corrosion resistance, perfect for marine and chemical industries

International Standards Equivalents

ASME B18.2.2 heavy hex nuts are compatible with several international standards, enabling their use in projects worldwide. Common equivalents include:

• ISO 4032 / DIN 934 – European standard
• JIS B1181 – Japanese standard
• BS 1768 – British standard

These global equivalents make our heavy hex nuts a reliable choice for cross-border engineering and construction requirements.

Industrial Applications

Heavy hex nuts are trusted in sectors where strength and safety are non-negotiable. Typical applications include:

• Construction & Infrastructure – Used in bridges, highways, and steel frameworks
• Heavy Equipment & Machinery – Ensures durable fastening in mechanical systems
• Oil & Gas – Suitable for high-pressure pipeline connections
• Power Plants – Used in turbines, transformers, and other critical components
• Marine & Offshore – Designed to withstand corrosive and extreme environments

Why Bigboltnut?

Bigboltnut stands out as a leading manufacturer and exporter of ASME B18.2.2 heavy hex nuts due to our commitment to quality and customer satisfaction. Here’s what sets us apart:

• Precision Engineering – Manufactured with tight tolerances for accuracy and fit
• Wide Range of Sizes – Standard and custom sizes available
• High-Quality Materials – Sourced and tested for maximum strength
• Global Standard Compliance – Conforms to ASME, ISO, DIN, and other international norms
• Bulk Supply Capability – Ideal for large-scale industrial and infrastructure projects

If you're seeking reliable fastening solutions that meet international quality benchmarks, Bigboltnut's ASME B18.2.2 heavy hex nuts are your go-to option. We are committed to delivering fasteners that perform under pressure—literally.