S-91819A140 1/2"-13 ASME B1.1, ASME B18.2.2, SAE J995 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional strength and reliability with Grade 8 classification, ensuring high tensile performance for demanding industrial applications
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments
• Precision thread engagement with Class 2B fit and UNC coarse thread design for quick assembly and reduced cross-threading risks
• Broad compatibility with standardized 1/2"-13 coarse threads, making it ideal for replacement and OEM applications
• Regulatory compliance assurance meeting RoHS 3 and REACH standards, supporting sustainable and safe manufacturing practices
• Rigorous quality certification to ASME B1.1, ASME B18.2.2, and SAE J995, guaranteeing consistent dimensional accuracy and performance
• Optimized for high-torque applications featuring a standard external hex drive and 3/4" width for secure wrenching and vibration resistance

Professional Applications & Engineering Value

This Grade 8 hex nut is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where vibration resistance and long-term durability are paramount. The zinc yellow-chromate plated steel construction provides a robust barrier against oxidation and chemical exposure, significantly reducing maintenance frequency in outdoor or corrosive settings. Its UNC coarse thread and Class 2B thread fit facilitate rapid installation while maintaining secure clamping force, minimizing the risk of loosening under dynamic loads. By conforming to ASME B18.2.2 and related standards, this nut delivers predictable performance in high-stress bolted joints, supporting structural integrity and operational safety in industrial fastening systems.

Specification Summary & Compliance

This hex nut adheres to precise dimensional standards with a Class 2B thread fit and UNC coarse thread profile (1/2"-13), ensuring compatibility with standardized components. Manufactured in compliance with ASME B1.1, ASME B18.2.2, and SAE J995 specifications, it guarantees consistent quality and interchangeability. The product is verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for hazardous substances.