S-91286A467 3/4"-10 x 3 1/2" 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 for reliable performance in high-stress applications
• Superior corrosion resistance through zinc-flake coating, extending service life in harsh industrial environments
• Precise torque transmission enabled by external hex drive design and 1 1/8" head width for secure installation
• Optimized thread engagement with UNC coarse threads and Class 2A fit ensuring vibration resistance and easy assembly
• Controlled partial threading (1 3/4" min thread length) providing maximum grip where needed while maintaining shank strength
• Certified material integrity through Grade 8 classification and Rockwell C33 hardness for consistent mechanical properties
• Regulatory compliance assurance meeting ASME B18.2.1 standards and environmental regulations (RoHS 3/REACH)

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw delivers critical performance where structural integrity is paramount. The zinc-flake coated steel construction provides superior corrosion protection compared to conventional platings, making it ideal for outdoor equipment, machinery frames, and structural assemblies exposed to environmental elements. The 3/4"-10 UNC coarse thread configuration ensures rapid installation and reliable clamping force in steel-to-steel connections, while the partial threading design concentrates strength in the engaged section while maintaining full shank diameter for shear resistance. With 150,000 psi tensile strength and verified compliance with ASME B18.2.1 specifications, this fastener eliminates uncertainty in critical bolted joints across construction, manufacturing, and heavy equipment sectors.

Specification Summary & Compliance

This 3/4"-10 UNC Class 2A threaded fastener features precise dimensional tolerances per ASME B18.2.1 specifications where applicable. The Grade 8 classification ensures consistent mechanical properties including Rockwell C33 hardness and 150,000 psi tensile strength. Manufacturing compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming restricted substance compliance for global industrial applications. The zinc-flake coating provides corrosion protection while maintaining dimensional integrity for reliable performance in demanding service conditions.