S-92186A917 1"-8 x 3 1/4" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and chemical exposure
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable heavy-duty performance
• Optimized load distribution through partial threading design, reducing stress concentration and preventing joint failure
• Precise and secure fastening ensured by Class 2A thread fit for consistent engagement and vibration resistance
• Easy installation and removal with external hex drive and 1 1/2" head width, compatible with standard tools
• Enhanced durability in coarse thread applications using 1"-8 UNC thread pattern for improved wear resistance in high-vibration settings
• Regulatory compliance assurance meeting ASME B18.2.1 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these heavy-duty hex head screws deliver critical performance where corrosion resistance and structural integrity are paramount. The 316 Stainless Steel composition provides exceptional protection against chloride-induced stress corrosion cracking, making them ideal for marine, chemical processing, and offshore applications. The partial threading design strategically concentrates thread engagement near the nut-bearing surface, minimizing thread stripping while maximizing clamp load efficiency. With coarse UNC threads maintaining reliable performance in high-vibration machinery and structural steel connections, these external hex drive fasteners ensure straightforward installation even in confined spaces. The combination of 70,000 psi tensile strength and standardized dimensions per ASME B18.2.1 guarantees interchangeability and predictable performance across industrial maintenance and OEM assembly operations.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance for consistent assembly performance. Complies with ASME B18.2.1 specifications for hex head screws and bolts. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for substance restrictions. Thread configuration: 1"-8 UNC coarse threads with right-hand direction. Mechanical properties include Rockwell B70 hardness and 70,000 psi minimum tensile strength.