S-93791A457 6-32 x 1/2" 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 black-oxide passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term fastening
• Precise thread engagement with Class 3A fit and UNC coarse threading, ensuring secure installation and vibration resistance
• Optimized flush mounting featuring a standard flat head with 82° countersink angle for seamless, low-profile surface integration
• Efficient installation and removal using a 5/64" hex drive, reducing assembly time and tool slippage risks
• Full threading along the 1/2" length provides maximum grip and load distribution across the entire fastener
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence

Professional Applications & Engineering Value

These 6-32 UNC flat head screws are engineered to address common industrial challenges such as material fatigue, corrosion in aggressive settings, and the need for reliable, flush-surface fastening. The 18-8 stainless steel base, enhanced by a black-oxide passivated finish, offers excellent resistance to oxidation and chemical exposure, making them suitable for machinery, electronics enclosures, and outdoor equipment. The Class 3A thread fit and coarse UNC threading ensure quick assembly with minimal cross-threading risks, while the 82° countersink angle allows the screw head to sit perfectly flush, preventing snagging and improving aesthetic finish. These features collectively enhance durability, reduce maintenance cycles, and support efficient production workflows in demanding industrial applications.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including a Class 3A thread fit for superior tolerance control and UNC coarse threads consistent with inch-system requirements. Manufacturing and quality are governed by ASME B18.3 specifications. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they are free of restricted hazardous substances and safe for various industrial and international markets.