S-90521A042 1 3/8"-8 ASTM A194 Hex Nuts
Hex Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior load distribution through extra wide profile design, reducing surface pressure and preventing material damage
- Exceptional strength performance with ASTM Grade 2H certification, ensuring reliable performance in high-stress applications
- Precise thread engagement with UN Class 2B thread fit, providing consistent mating and reducing cross-threading risks
- Enhanced durability from high-quality steel construction, offering excellent resistance to wear and deformation
- Industry-standard compliance with ASTM A194 specifications, guaranteeing consistent quality and performance
- Environmental responsibility through RoHS 3 and REACH compliance, meeting strict regulatory requirements
- Optimal torque transmission with external hex drive design, enabling efficient installation with standard tools
Professional Applications & Engineering Value
This heavy-duty hex nut addresses critical engineering challenges in demanding industrial environments where vibration resistance and load-bearing capacity are paramount. The extra wide profile significantly increases bearing surface area, distributing clamping forces more effectively to prevent joint loosening under dynamic loads. Manufactured from high-strength steel and meeting ASTM Grade 2H requirements, this nut maintains structural integrity in applications subject to extreme tension and shear stresses. The 1 3/8"-8 coarse thread configuration with UN Class 2B fit ensures rapid assembly while maintaining precise thread engagement, making it ideal for construction equipment, heavy machinery, structural steel connections, and industrial processing systems where reliability cannot be compromised.
Specification Summary & Compliance
This inch system hex nut features precise Class 2B thread fit tolerance per UN standards with right-hand coarse threading (1 3/8"-8). Dimensions include 2 3/16" width across flats and 1 11/32" height. Manufacturing complies with ASTM A194 specifications for heavy hex nuts, with material strength meeting ASTM Grade 2H requirements. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring responsible material sourcing and manufacturing practices.
