S-98427A350 1"-8 ASTM A563 Hex Nuts

Key Features & Benefits at a Glance

• Enhanced load distribution due to the extra wide profile (1 5/8" width), reducing surface pressure and preventing material damage in heavy-duty assemblies.
• Superior mechanical strength from ASTM A563 Grade DH certification, ensuring reliable performance under high stress and vibration.
• Quick and secure installation with 1"-8 UNC coarse threads and Class 2B fit, providing excellent engagement and resistance to cross-threading.
• Robust durability from high-quality steel construction, offering excellent resistance to wear, corrosion, and industrial environmental factors.
• Compliance with global standards including RoHS 3 and REACH, making it suitable for regulated industries and international supply chains.
• Optimized for external hex drive tools, allowing for high-torque application and easy maintenance in confined spaces.
• Right-hand thread design ensures compatibility with standard components and simplifies assembly processes.

Professional Applications & Engineering Value

This heavy hex nut is engineered to address critical challenges in structural and machinery applications where failure is not an option. The extra wide profile and ASTM A563 Grade DH material provide exceptional clamp load distribution and fatigue resistance, preventing joint loosening in high-vibration environments like construction equipment, mining machinery, and heavy transport. The 1"-8 UNC coarse thread with Class 2B fit ensures rapid assembly without sacrificing thread integrity, reducing installation time while maintaining a secure connection. Made from durable steel and compliant with RoHS and REACH, it offers long-term reliability in corrosive or regulated industrial settings, making it a trusted choice for engineers specifying inch system fasteners for critical connections.

Specification Summary & Compliance

This nut meets ASTM A563 specifications for heavy hex nuts, with 1"-8 UNC coarse threads and Class 2B thread fit ensuring precise dimensional accuracy. It is manufactured from steel with an external hex drive style, width of 1 5/8", and height of 63/64". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious and safety-critical industrial applications.