S-91286A475 3/4"-10 x 5" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength and Grade 8 classification for reliable performance in demanding applications
• Superior corrosion resistance provided by zinc-flake coating, extending service life in harsh industrial environments
• Optimized torque transmission through external hex drive and 1 1/8" head width for secure installation and removal
• Enhanced thread engagement with UNC coarse thread pattern and Class 2A fit ensuring consistent fastening performance
• Reduced weight and material usage through partial threading while maintaining 1 3/4" minimum thread length for sufficient grip
• Consistent mechanical properties with Rockwell C33 hardness for durability against wear and deformation
• Regulatory compliance assurance meeting ASME B18.2.1 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

This Grade 8 hex head screw delivers critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where high tensile strength and corrosion resistance are paramount. The zinc-flake coated surface provides superior protection against chemical exposure and environmental factors, while the external hex drive design ensures maximum torque application during installation. The 3/4"-10 UNC coarse thread configuration offers excellent vibration resistance and quick assembly in steel frameworks, construction projects, and manufacturing applications. With partial threading optimizing the strength-to-weight ratio, this fastener prevents joint slippage and maintains structural integrity under extreme loads, making it ideal for critical connections in automotive, aerospace, and heavy equipment industries.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC coarse thread specifications. Complies with ASME B18.2.1 mechanical standards and SAE J429 Grade 8 requirements. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards. The fastener features right-hand thread direction, 5" overall length, and 1 3/4" minimum thread length for consistent performance across industrial applications.