S-92210A740 1/2"-20 x 3/4" 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 industrial environments.
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, heavy-duty fastening.
• Precise thread engagement with Class 3A fit and UNF fine threads, ensuring secure, vibration-resistant connections.
• Efficient installation and flush finish thanks to the standard 82° countersink angle and 5/16" hex drive for easy torque application.
• Full threading along the 3/4" length provides maximum grip and load distribution across the entire fastener.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing quality and environmental safety.
• Right-hand thread direction and fine spacing for precise adjustment and enhanced holding power in dynamic applications.

Professional Applications & Engineering Value

Engineered for demanding environments, these 1/2"-20 UNF flat head screws in 18-8 stainless steel address common industrial challenges such as corrosion, vibration loosening, and high-stress loads. The passivated finish significantly enhances durability against moisture and chemicals, extending service life in machinery, automotive, and construction assemblies. With a Class 3A thread fit and fine thread spacing, they deliver superior clamping force and resistance to shock, making them ideal for precision equipment, enclosures, and structural frameworks where reliability is critical. The combination of a flat head with an 82° countersink ensures a seamless, flush mount, reducing protrusion risks and improving aerodynamic or aesthetic profiles in finished products.

Specification Summary & Compliance

This screw features a 1/2"-20 UNF thread with Class 3A precision fit and fine spacing for tight tolerances. It adheres to ASME B18.3 manufacturing standards, ensuring dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for various industrial and export markets.