S-90521A295 1 3/8"-12 ASME B18.2.2, ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional load distribution thanks to the extra wide hex profile, reducing surface pressure and preventing material deformation
• Superior vibration resistance with fine UNF threads and Class 2B fit, maintaining secure fastening in high-stress environments
• Heavy-duty performance guaranteed by ASTM Grade 2H steel, offering high tensile strength for demanding industrial applications
• Enhanced durability and corrosion resistance from quality steel construction, extending service life in harsh conditions
• Reliable standardization through compliance with ASME B18.2.2 and ASTM A194, ensuring consistent quality and interchangeability
• Safe for regulated industries with full RoHS 3 and REACH compliance, meeting strict environmental and safety standards
• Optimized wrench engagement from the 2 3/16" width, providing superior torque application and reducing slippage risks

Professional Applications & Engineering Value

This heavy-duty hex nut is engineered to address critical challenges in industrial assembly where vibration loosening and high tensile loads are common. The ASTM Grade 2H steel construction provides exceptional strength-to-weight ratio, while the extra wide profile distributes clamping force more effectively, preventing joint failure in machinery, structural steel connections, and heavy equipment. The 1 3/8"-12 UNF fine thread configuration offers superior resistance to vibrational loosening compared to coarse threads, making it ideal for automotive, aerospace, and manufacturing applications where precision and reliability are paramount. Combined with Class 2B thread fit, this nut ensures smooth assembly and consistent performance in high-cycle production environments.

Specification Summary & Compliance

This hex nut maintains Class 2B thread fit tolerances per UNF standards with dimensions of 2 3/16" width and 1 11/32" height. Manufacturing complies with ASME B18.2.2 dimensional specifications and ASTM A194 material requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for global industrial applications.