S-92620A825 5/8"-18 x 2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance through zinc yellow-chromate plating that extends service life in harsh environments
• Precise thread engagement with UNF fine threading and Class 2A fit ensures secure fastening and vibration resistance
• Maximum thread coverage with fully threaded design provides consistent clamping force along the entire 2" length
• Enhanced durability from Rockwell C33 hardness maintains structural integrity under repeated stress
• Optimized drive efficiency with external hex head design allows for high-torque installation using standard tools
• Regulatory compliance assurance meeting ASME B18.2.1 and SAE J429 standards for quality and reliability

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical performance advantages for industrial applications where failure is not an option. The combination of 150,000 psi tensile strength and Rockwell C33 hardness provides exceptional resistance to shear and tensile forces in heavy machinery, structural assemblies, and automotive systems. The UNF fine threading with Class 2A fit ensures precise engagement that maintains clamp load under vibration, while the zinc yellow-chromate plating offers superior protection against corrosion in demanding environments. As fully threaded steel fasteners, they distribute stress evenly along the entire length, making them ideal for critical connections in construction equipment, industrial machinery, and transportation applications where reliability and durability are paramount.

Specification Summary & Compliance

This 5/8"-18 hex head screw features precise Class 2A thread fit tolerances and complies with ASME B18.2.1 and SAE J429 manufacturing specifications. The fastener meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations regarding chemical safety. Manufactured to Grade 8 strength classification with verified mechanical properties including 150,000 psi tensile strength and Rockwell C33 hardness, ensuring consistent performance across industrial applications.