S-90580A383 1"-8 ASTM A563 Hex Nuts

Key Features & Benefits at a Glance

• Superior load distribution thanks to the extra wide hex profile, reducing stress concentration and preventing joint failure in heavy-duty applications
• Enhanced corrosion resistance from the black-oxide steel finish, providing long-term durability in harsh industrial environments
• Reliable coarse threading (1"-8 UNC) ensures quick assembly and reduced risk of cross-threading, improving installation efficiency
• High-strength ASTM Grade C construction meets rigorous ASTM A563 standards, guaranteeing consistent performance under high tensile loads
• Precise Class 2B thread fit offers optimal engagement with mating bolts, minimizing loosening and maintaining secure connections
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and unrestricted use in global industrial supply chains
• Right-hand thread design provides standard, intuitive installation for maintenance and production line workflows

Professional Applications & Engineering Value

Engineered for demanding environments, these heavy-duty hex nuts address critical challenges in structural and machinery applications. The black-oxide steel construction, compliant with ASTM A563, combines high tensile strength with corrosion inhibition, making these 1"-8 UNC coarse thread nuts ideal for construction equipment, agricultural machinery, and transportation infrastructure where vibration and load stress are prevalent. The extra wide profile significantly increases bearing surface area, distributing clamp load more effectively to prevent surface damage and joint fatigue. This design is particularly valuable in industrial assembly lines and maintenance operations, where reliability and quick installation of right-hand thread components reduce downtime and lifecycle costs.

Specification Summary & Compliance

This nut features a 1"-8 UNC coarse thread with Class 2B thread fit for consistent mating accuracy. Manufactured to ASTM A563 specifications with ASTM Grade C strength classification, it ensures dimensional stability under load. Physical dimensions include a 1 5/8" width and 63/64" height for the extra wide profile. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental and safety standards for industrial fastener applications.