S-90499A859 1 1/4"-7 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional Strength: Grade 8 steel construction provides superior load-bearing capacity and resistance to shear, making it ideal for the most demanding heavy-duty applications.
• Reliable Coarse Threading: The 1 1/4"-7 UNC coarse thread design ensures faster assembly and reduced susceptibility to cross-threading and galling in harsh environments.
• Precision Thread Fit: Class 2B thread fit offers excellent interchangeability and a secure, vibration-resistant connection without binding.
• Optimized for High Torque: The standard external hex drive and 1 7/8" width allow for high torque application with common tools, ensuring a tight, reliable clamp.
• Enhanced Durability: Manufactured from high-strength steel, this nut resists deformation and maintains integrity under extreme static and dynamic loads.
• Regulatory Compliance: Meets RoHS 3 and REACH standards, ensuring the nut is free from hazardous substances for safe use in regulated industries.
• Standardized Dimensions: The standard hex profile and inch system measurements guarantee easy replacement and compatibility with existing UNC threaded components.

Professional Applications & Engineering Value

This Grade 8 steel hex nut is engineered for critical heavy-duty applications where failure is not an option. Its 1 1/4"-7 UNC coarse thread and Class 2B fit provide a robust, vibration-resistant connection that is essential in construction machinery, automotive assemblies, and structural steelwork. The external hex drive design allows for high torque application with standard wrenches, speeding up assembly and maintenance processes. Made from high-tensile steel, it effectively solves common industrial challenges like joint loosening under dynamic loads and exposure to corrosive elements, ensuring long-term reliability and reducing maintenance downtime in demanding operational environments.

Specification Summary & Compliance

This hex nut conforms to UNC (Unified Coarse Thread) standards with a Class 2B thread fit for consistent dimensional accuracy and interchangeability. The manufacturing adheres to the Grade 8 strength classification, ensuring high mechanical performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for industrial use. Key dimensions include a 1 7/8" width and 1 1/16" height within the inch measurement system.