S-90585A683 3/8"-16 x 6" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments due to 316 stainless steel construction with passivated finish
• Exceptional load-bearing capability with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Precise, reliable fastening ensured by Class 3A thread fit and fully threaded UNC coarse profile
• Secure installation and removal with 7/32" hex drive and standard 82° countersink angle for flush mounting
• Long-term durability from inch-system dimensional accuracy and robust material properties
• Regulatory compliance meeting ASME B18.3 standards, RoHS 3, and REACH for global industrial use
• Versatile heavy-duty performance in 6" length with flat head design for structural and machinery applications

Professional Applications & Engineering Value

This 316 stainless steel flat head screw delivers critical corrosion resistance and mechanical strength in demanding industrial settings. The passivated finish enhances surface durability against chemicals and moisture, while the Class 3A thread fit and UNC coarse threading provide vibration-resistant, precise fastening in heavy machinery, marine equipment, and chemical processing systems. Its 82° countersink angle and hex drive enable flush, secure installations in metal frameworks and structural components, reducing maintenance needs and ensuring long-term reliability under high-stress conditions.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit and inch-system tolerances. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards for industrial fastener applications.