S-91247A824 5/8"-11 x 9" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 120,000 psi ensures reliable performance in demanding applications
• Superior corrosion resistance with zinc plating for extended service life in harsh environments
• Precise Class 2A thread fit guarantees smooth installation and secure fastening connections
• Heavy-duty Grade 5 construction with Rockwell C25 hardness provides outstanding durability
• Optimized partial threading with 1 3/4" minimum thread length offers ideal grip range flexibility
• Standard-compliant design meeting ASME B18.2.1 and SAE J429 specifications for quality assurance
• External hex drive design enables high-torque installation with common tools

Professional Applications & Engineering Value

This Grade 5 hex head screw delivers critical engineering value through its 5/8"-11 UNC coarse threading and zinc plated finish, specifically engineered for heavy-duty industrial applications. The 9" length with partial threading provides optimal stress distribution in structural assemblies, while the 120,000 psi tensile strength ensures reliable performance under extreme loads. The external hex drive facilitates high-torque installation in confined spaces, making it ideal for construction equipment, machinery frames, and structural steel connections where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit standards with 5/8"-11 UNC coarse threading in right-hand direction. Complies with ASME B18.2.1 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical properties. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for safe industrial use.