S-92620A610 5/16"-24 x 7/8" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 PSI ensures reliable performance in high-stress industrial environments, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh conditions, minimizing maintenance and replacement costs.
• High hardness rating (Rockwell C33) provides excellent wear resistance, maintaining thread integrity through repeated assembly and disassembly cycles.
• Precision UNF fine threading with Class 2A fit offers secure, vibration-resistant connections in critical applications requiring fine adjustment.
• Full threading along the 7/8" length allows for maximum grip and uniform load distribution across the entire fastened joint.
• External hex drive design enables easy installation and high torque application with standard tools, improving assembly efficiency.
• Compliance with major industry standards including ASME B18.2.1 and SAE J429 ensures consistent quality and interoperability in regulated applications.

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical performance in demanding applications where failure is not an option. The combination of high-strength steel and UNF fine threading provides superior resistance to vibrational loosening in machinery, automotive assemblies, and heavy equipment. The zinc yellow-chromate plating creates a protective barrier against corrosion in outdoor or chemically aggressive environments, significantly extending maintenance intervals. Engineers specify these fully threaded fasteners for structural connections requiring uniform stress distribution, while the external hex drive accommodates high torque requirements without stripping. These industrial screws solve common challenges of joint integrity, corrosion management, and installation efficiency in critical assemblies.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with Class 2A thread fit tolerances ensuring consistent engagement. Thread specifications conform to UNF 5/16"-24 standards with right-hand thread direction. Compliance verified with ASME B18.2.1 and SAE J429 manufacturing specifications. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for restricted substance control.