S-92620A699 7/16"-20 x 1 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capability with 150,000 psi tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance provided by zinc yellow-chromate plating, extending service life in harsh environments
• Precise thread engagement with Class 2A UNF fine threads ensuring secure fastening and vibration resistance
• Maximum hardness durability through Rockwell C33 hardness rating, maintaining structural integrity under heavy loads
• Optimized torque transmission via external hex drive design for efficient installation and removal
• Full-threaded coverage along the 1½" length for consistent clamping force distribution
• Regulatory compliance assurance meeting ASME B18.2.1, RoHS 3, and REACH standards for quality and safety

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical performance in demanding industrial environments where fastener failure is not an option. The 7/16"-20 UNF fine thread configuration provides superior resistance to vibrational loosening compared to coarse threads, while the zinc yellow-chromate plating creates a robust barrier against corrosion in manufacturing facilities, outdoor equipment, and automotive applications. The fully threaded design ensures maximum thread engagement throughout the fastened joint, distributing stress evenly to prevent point failures. Engineered with 150,000 psi tensile strength and Rockwell C33 hardness, these screws maintain their mechanical properties under extreme loads, making them ideal for structural connections, heavy machinery assembly, and critical infrastructure projects where reliability and longevity are paramount.

Specification Summary & Compliance

This hex head screw features precise Class 2A thread fit tolerances with 7/16"-20 UNF fine threads in right-hand direction. Manufacturing complies with ASME B18.2.1 specifications where identified by SAE J429 standards. The fastener meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) regulations current as of January 17, 2023, addressing 233 Substances of Very High Concern. The combination of Grade 8 strength classification and zinc yellow-chromate plating ensures both mechanical performance and environmental durability.