S-99894A509 5/8"-11 x 2" MS90725-164 Mil. Spec. Medium-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through cadmium plating that protects against rust and extends service life
• Optimized thread engagement with UNC coarse threading that provides faster assembly and reduced cross-threading risk
• Precise mechanical properties with Rockwell C25 hardness ensuring consistent performance under stress
• Enhanced torque transmission through the 15/16" hex head design for secure installation with standard tools
• Reliable thread compatibility with Class 2A fit ensuring proper mating with standard nuts and components
• Industry-standard compliance meeting MS90725-164 specifications for quality assurance in critical applications

Professional Applications & Engineering Value

These Grade 5 hex head screws deliver exceptional engineering value for heavy-duty industrial applications where reliability is paramount. The combination of high-strength steel construction and cadmium plating addresses critical challenges in corrosive environments while maintaining structural integrity. The 5/8"-11 UNC coarse thread configuration ensures rapid assembly in construction equipment, machinery frames, and structural steel connections. With full threading along the 2" length, these external hex drive screws provide maximum grip strength and uniform stress distribution, preventing joint failure in high-vibration settings. The right-hand thread direction and standardized dimensions make them compatible with existing industrial systems, reducing installation time and maintenance costs.

Specification Summary & Compliance

This hex head screw features precise Class 2A thread fit per UNC standards, ensuring proper engagement with mating components. Manufacturing complies with MS90725-164 specifications, guaranteeing dimensional accuracy and performance consistency. The Grade 5 classification confirms mechanical properties including 120,000 psi tensile strength and Rockwell C25 hardness. The cadmium plating provides corrosion protection while maintaining electrical conductivity where required. These fasteners are suitable for applications requiring reliable performance in industrial and construction environments.