S-97763A357 5/16"-18 x 1/2" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments.
• High tensile strength of 70,000 psi ensures reliable performance in demanding applications, reducing failure risks.
• Precise Class 3A thread fit provides superior engagement and vibration resistance for secure assemblies.
• 3/16" hex drive design allows for easy installation and high torque application with standard tools.
• Fully threaded body offers maximum grip and load distribution along the entire length.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards.
• Rockwell B55 hardness enhances durability and wear resistance for long-term use.

Professional Applications & Engineering Value

Engineered for industrial and mechanical assemblies, these 5/16"-18 UNC screws with Black-Oxide 18-8 Stainless Steel provide robust corrosion protection, essential in moist or chemical-exposed settings. The rounded head and hex drive facilitate quick, secure fastening in tight spaces, minimizing installation time. With a coarse thread and Class 3A fit, they resist loosening under vibration, making them ideal for machinery, automotive, and construction applications. Their high tensile strength and full threading ensure even stress distribution, reducing the risk of stripping and enhancing structural integrity in heavy-duty uses.

Specification Summary & Compliance

This screw adheres to Class 3A thread fit for precise tolerances and UNC coarse threading (5/16"-18) per inch system standards. It meets ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.