S-92210A746 1/2"-20 x 2" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments and long-term reliability
• Precise, vibration-resistant fastening through Class 3A UNF fine threading, ensuring tight, secure connections in demanding applications
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness, providing dependable performance under heavy loads
• Efficient installation and removal using the 5/16" hex drive, allowing for high torque application without slippage
• Flush surface mounting with standard flat head profile and 82° countersink angle, preventing protrusion and improving safety
• Full thread engagement along the 2" length, maximizing grip and distribution of clamping force
• Regulatory compliance assurance meeting ASME B18.3, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

This 18-8 stainless steel flat head screw with Class 3A UNF fine threading is engineered to address critical industrial challenges, such as vibration loosening and chemical exposure. The passivated finish enhances its corrosion resistance, making it suitable for applications in marine, chemical processing, and food equipment where moisture and aggressive substances are present. The hex drive and flat head design ensure easy, secure installation in countersunk holes, providing a smooth surface that reduces snagging and improves aerodynamic or aesthetic profiles. With high tensile strength and full threading, it delivers reliable performance in heavy-duty fastening for machinery, structural assemblies, and precision equipment, minimizing maintenance needs and downtime.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 3A thread fit for tight tolerances and 1/2"-20 UNF fine threads per industry norms. It conforms to ASME B18.3 specifications for consistency and reliability. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety requirements for hazardous substance restrictions.