S-91247A847 3/4"-10 x 3" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in heavy-duty applications
• Superior corrosion resistance through zinc plating, extending service life in demanding industrial environments
• Optimized torque transmission with external hex drive design and 1 1/8" head width for secure fastening operations
• Enhanced thread engagement with UNC coarse thread pattern and Class 2A fit ensuring vibration resistance and easy assembly
• Controlled thread application through partial threading design for precise load distribution and joint integrity
• Consistent mechanical properties with Rockwell C25 hardness maintaining dimensional stability under stress
• Industry-standard compatibility meeting ASME B18.2.1 specifications for reliable interchangeability

Professional Applications & Engineering Value

This Grade 5 hex head screw delivers critical engineering solutions for industrial assembly challenges where vibration resistance and structural integrity are paramount. The zinc plated steel construction provides essential corrosion protection for machinery, structural frames, and equipment subjected to harsh operating conditions. The 3/4"-10 UNC coarse thread configuration ensures rapid assembly and disassembly while maintaining secure fastening in high-vibration environments. With partial threading and external hex drive, this fastener offers precise installation control for heavy-duty applications across construction, manufacturing, and industrial maintenance sectors. The combination of 120,000 psi tensile strength and standardized dimensions makes it ideal for critical joints requiring predictable performance and compliance with engineering specifications.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance and 3/4"-10 UNC coarse thread specifications. Complies with ASME B18.2.1 mechanical standards and SAE J429 Grade 5 requirements for consistent performance. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for hazardous substance restrictions. The partially threaded design with minimum 1 3/4" thread length ensures proper engagement while maintaining structural integrity across the 3" overall length.