S-91247A341 7/16"-20 x 6 1/2" 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 demanding applications
• Superior corrosion resistance through zinc plating, extending service life in harsh industrial environments
• Precise thread engagement with UNF fine threads and Class 2A fit ensuring vibration-resistant connections
• Optimized torque transmission through external hex drive design for efficient installation with standard tools
• Enhanced durability with Rockwell C25 hardness providing excellent resistance to wear and deformation
• Reduced assembly weight through partial threading while maintaining full strength in critical engagement areas
• Regulatory compliance assurance meeting ASME B18.2.1, RoHS 3, and REACH standards for global acceptance

Professional Applications & Engineering Value

These Grade 5 hex head screws deliver critical engineering solutions for heavy-duty industrial applications where vibration resistance and structural integrity are paramount. The zinc plated steel construction provides essential corrosion protection in manufacturing facilities, construction sites, and machinery assembly. The UNF fine thread configuration offers superior holding power compared to coarse threads, making these partially threaded fasteners ideal for applications requiring precise clamp load distribution. The external hex drive design ensures compatibility with standard wrenching tools while the 6 1/2" length accommodates thick material sections commonly found in structural steelwork, heavy equipment manufacturing, and industrial machinery assembly where reliable fastening solutions must withstand extreme operational stresses.

Specification Summary & Compliance

Manufactured to exacting ASME B18.2.1 specifications and SAE J429 standards, these screws feature Class 2A thread fit tolerances for consistent assembly performance. The 7/16"-20 UNF fine thread configuration ensures precise engagement while the partial threading optimizes strength-to-weight ratio. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental responsibility and global market acceptance for industrial procurement.