S-95362A517 5/8"-11 x 2 1/2" ASME B18.2.1, SAE J429, ASTM A354BD, MS90728-166 Mil. Spec. High-Strength 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 yellow-chromate plating that extends service life in harsh environments
• Optimized torque transmission with external hex drive design ensuring secure installation and removal
• Enhanced thread engagement with UNC coarse threads providing faster assembly and reduced cross-threading risk
• Consistent mechanical properties maintained through Rockwell C33 hardness for dependable performance
• Reduced weight and material usage with partial threading while maintaining full strength where needed
• Regulatory compliance assurance meeting REACH environmental standards for safe industrial use

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 hex head screw delivers exceptional performance where failure is not an option. The zinc yellow-chromate plating provides superior corrosion protection, making it ideal for outdoor equipment, construction machinery, and manufacturing facilities exposed to moisture and chemicals. The 5/8"-11 UNC coarse threads ensure rapid assembly in thick materials while minimizing thread stripping. With 150,000 psi tensile strength and Rockwell C33 hardness, this fastener maintains structural integrity under extreme vibration and dynamic loads. The partially threaded design concentrates strength where needed while reducing weight, perfect for structural connections, heavy equipment assembly, and industrial machinery requiring reliable fastening solutions that withstand demanding operational conditions.

Specification Summary & Compliance

This Grade 8 hex head screw features precision Class 2A thread fit with 5/8"-11 UNC coarse threads and 2 1/2" length. Manufactured to exacting standards including ASME B18.2.1, SAE J429, and ASTM A354BD specifications, ensuring dimensional accuracy and mechanical consistency. The fastener is REACH (EC 1907/2006) compliant and meets MS90728-166 requirements, providing assurance of environmental responsibility and regulatory adherence for industrial procurement.