S-90521A055 1 5/8"-8 ASME B18.2.2, ASTM A194 Hex Nuts

Key Features & Benefits at a Glance

• Superior load distribution with an extra wide profile to reduce surface pressure and prevent joint failure in heavy-duty applications.
• High tensile strength and reliability from ASTM Grade 2H steel, ensuring consistent performance under extreme mechanical stress.
• Precise, vibration-resistant fastening thanks to UN fine threads with Class 2B fit, minimizing loosening in dynamic environments.
• Broad compatibility and interchangeability by conforming to ASME B18.2.2 standards, facilitating easy integration into existing inch-system assemblies.
• Enhanced corrosion and environmental resistance with RoHS 3 and REACH compliance, ideal for regulated industrial settings.
• Easy installation and removal using standard external hex drive tools, reducing assembly time and labor costs.
• Durable, long-lasting construction from high-grade steel, providing excellent wear resistance and extended service life.

Professional Applications & Engineering Value

This heavy-duty extra wide hex nut is engineered to address critical challenges in industrial and construction sectors, where vibration, high loads, and environmental factors can compromise fastener integrity. Made from ASTM Grade 2H steel, it offers exceptional strength and fatigue resistance, making it suitable for structural connections, machinery bases, and heavy equipment assemblies. The UN fine thread design ensures a tight, secure fit that resists loosening under dynamic stresses, while the extra wide profile distributes clamping force more evenly, reducing the risk of damage to connected materials. Compliant with ASME B18.2.2 and featuring RoHS 3 and REACH compliance, this nut is ideal for applications in automotive, aerospace, and industrial manufacturing, providing reliable performance and regulatory adherence.

Specification Summary & Compliance

This nut features a 1 5/8"-8 UN fine thread with Class 2B thread fit for precise dimensional accuracy, manufactured in accordance with ASME B18.2.2 and ASTM A194 standards. It is constructed from ASTM Grade 2H steel, ensuring high strength and durability. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.