S-90521A255 1"-8 ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Superior load distribution with an extra wide hex profile, reducing the risk of loosening under heavy vibration and stress in industrial machinery.
• High tensile strength from ASTM Grade 2H steel construction, ensuring reliable performance in demanding applications without premature failure.
• Easy installation and removal thanks to the external hex drive design, compatible with standard wrenches for efficient assembly and maintenance.
• Accurate and secure thread engagement with Class 2B thread fit and 1"-8 UNC coarse threading, providing consistent clamping force and resistance to cross-threading.
• Long-term durability in harsh environments, made from robust steel that withstands corrosion and wear over extended use.
• Compliance with global standards including ASTM A194 for material quality, plus RoHS 3 and REACH, ensuring safe and sustainable use in regulated industries.
• Optimized for heavy-duty applications such as construction and machinery, where extra width (1 5/8") enhances stability and load-bearing capacity.

Professional Applications & Engineering Value

This Grade 2H heavy-duty hex nut is engineered to address common challenges in industrial settings, such as joint failure under dynamic loads and corrosion in aggressive environments. Made from high-strength steel and featuring an extra wide profile, it distributes clamping force evenly, minimizing stress concentration and preventing loosening in vibrating machinery. The 1"-8 UNC coarse thread and Class 2B thread fit ensure quick, reliable assembly with reduced risk of stripping, while the external hex drive allows for straightforward torque application with standard tools. Ideal for heavy machinery, structural frameworks, and equipment requiring ASTM A194 compliance, this nut delivers consistent performance, enhancing safety and reducing maintenance downtime in sectors like manufacturing, construction, and automotive.

Specification Summary & Compliance

This hex nut adheres to precise dimensional standards, including a Class 2B thread fit and UNC coarse threading with 1"-8 size for accurate engagement. It meets ASTM A194 specifications for material and manufacturing quality, ensuring high tensile strength and reliability. Additionally, the product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally safe and sustainable industrial practices.