S-92865A405 9/16"-18 x 2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional strength with 120,000 psi tensile strength and Grade 5 classification for reliable performance in high-stress applications
• Superior corrosion resistance through zinc plating, extending service life in harsh industrial environments
• Precision fine threading with UNF 9/16"-18 thread pattern and Class 2A fit for secure, vibration-resistant connections
• Optimized drive efficiency with external hex head design providing maximum torque application and installation control
• Enhanced durability with Rockwell C25 hardness rating maintaining structural integrity under repeated loading
• Full thread coverage along the 2" length ensures maximum grip and load distribution across the entire fastener
• Regulatory compliance meeting ASME B18.2.1 and SAE J429 specifications for quality assurance

Professional Applications & Engineering Value

This Grade 5 steel hex head screw delivers critical performance in demanding industrial applications where high tensile strength and reliable fastening are paramount. The UNF fine thread configuration provides superior resistance to vibration loosening compared to coarse threads, making it ideal for machinery, automotive assemblies, and structural frameworks subject to dynamic loads. The zinc plated finish creates a protective barrier against oxidation and environmental corrosion, significantly extending service life in outdoor or chemically aggressive environments. With its external hex drive and substantial 13/16" head width, the screw enables high-torque installation without stripping, while the fully threaded design ensures maximum engagement and load distribution across the entire 2" length for superior joint integrity.

Specification Summary & Compliance

This 9/16"-18 UNF hex head screw features Class 2A thread fit tolerances ensuring precise mating with standard nuts and threaded components. Manufactured to ASME B18.2.1 and SAE J429 Grade 5 specifications, it delivers consistent dimensional accuracy and mechanical properties. The fastener is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations, making it suitable for regulated industries and international markets requiring environmental compliance.