S-91247A223 3/8"-24 x 2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with 120,000 psi tensile strength for reliable performance in high-stress applications
• Enhanced corrosion resistance through zinc plating, extending service life in demanding industrial environments
• Precise thread engagement with Class 2A fit and UNF fine threading for secure, vibration-resistant connections
• Optimized torque transmission through external hex drive design, enabling efficient installation with standard tools
• Controlled partial threading providing both gripping power and clearance where needed for versatile assembly solutions
• Certified material integrity with Grade 5 steel and Rockwell C25 hardness ensuring consistent mechanical properties
• Regulatory compliance assurance meeting ASME B18.2.1, SAE J429 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

This Grade 5 steel hex head screw delivers exceptional engineering value through its carefully engineered combination of 3/8"-24 UNF fine threading and zinc plated finish. The partially threaded design addresses common assembly challenges by providing both maximum grip length and clearance sections, making it ideal for machinery, automotive, and structural applications where vibration resistance is critical. The external hex drive ensures reliable torque application without cam-out, while the Class 2A thread fit guarantees consistent engagement in high-cycle production environments. With its 120,000 psi tensile strength and Rockwell C25 hardness, this fastener maintains integrity under dynamic loads and extreme conditions, solving durability concerns in heavy equipment, industrial machinery, and construction applications where failure is not an option.

Specification Summary & Compliance

This 2" length hex head screw features precise Class 2A thread fit with 3/8"-24 UNF fine threading in right-hand direction, manufactured to ASME B18.2.1 and SAE J429 specifications. The fastener demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets while maintaining the dimensional accuracy and mechanical properties required for industrial applications.