S-92210A728 1/2"-13 x 4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Superior load-bearing capability with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Precise, reliable fastening ensured by Class 3A thread fit and UNC coarse threading for vibration resistance
• Efficient installation and flush seating with 5/16" hex drive and 82° countersink angle for streamlined assembly
• Full-length thread engagement across the 4" length provides maximum grip and uniform stress distribution
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and safety
• Durable, maintenance-free performance in corrosive or high-moisture settings due to material and finish properties

Professional Applications & Engineering Value

This 1/2"-13 UNC flat head screw is engineered to address critical challenges in industrial assembly, machinery, and structural applications where corrosion resistance and high tensile strength are paramount. The 18-8 stainless steel material, combined with a passivated finish, significantly extends service life in aggressive environments, reducing maintenance costs and downtime. The Class 3A thread fit and coarse UNC threading ensure secure, vibration-resistant connections, preventing loosening under dynamic loads. The hex drive and 82° countersink facilitate quick, flush installation, minimizing protrusion and enhancing safety in automated or high-traffic settings. Ideal for heavy equipment, marine components, and construction frameworks, this screw delivers reliable performance where failure is not an option.

Specification Summary & Compliance

This screw adheres to Class 3A thread tolerance for precise fit and is manufactured per ASME B18.3 specifications. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory alignment. Key dimensional attributes include a 1/2"-13 UNC coarse thread, 4" length with full threading, and standard 82° flat head profile.