S-92210A578 5/16"-18 x 1/2" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel and passivated finish, ideal for harsh environments
• Exceptional tensile strength of 70,000 PSI for reliable, heavy-duty fastening in demanding applications
• Precise Class 3A thread fit ensures smooth assembly and secure, vibration-resistant connections
• Convenient hex drive (3/16") allows for high-torque installation with standard tools, reducing assembly time
• 82° countersink angle and flat head design provides a flush, professional finish for streamlined surfaces
• Full threading along the 1/2" length offers maximum grip and adjustability in various material thicknesses
• Compliance with ASME B18.3, RoHS, and REACH guarantees quality, safety, and environmental standards

Professional Applications & Engineering Value

These 5/16"-18 UNC flat head screws in 18-8 stainless steel are engineered to address common industrial challenges such as corrosion, vibration loosening, and high-stress demands. The passivated finish enhances durability in moist or chemical-exposed settings, while the coarse UNC threads and Class 3A fit ensure quick, secure installations in metals and plastics. With a hex drive for efficient torque application and an 82° countersink for seamless integration, they are ideal for machinery, automotive assemblies, and construction projects where reliable fastening and long-term performance are critical.

Specification Summary & Compliance

This product adheres to Class 3A thread fit for precise dimensional accuracy and UNC coarse thread standards. Manufacturing complies with ASME B18.3 specifications, and it is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and regulatory adherence.