S-90585A720 1/2"-13 x 2" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and chemical exposure
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term fastening
• Precise thread engagement through Class 3A fit and UNC coarse thread design, ensuring secure installations and vibration resistance
• Optimized drive efficiency with 5/16" hex drive, providing high torque transfer and reduced cam-out risk
• Enhanced flush mounting with standard 82° countersink angle flat head, creating smooth surfaces in assembled components
• Full-length threading for maximum grip along the entire 2" length, accommodating various material thicknesses
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental directives (RoHS 3 & REACH)

Professional Applications & Engineering Value

This 316 stainless steel flat head screw delivers critical performance in demanding industrial settings where corrosion resistance and structural integrity are paramount. The passivated finish enhances surface durability, preventing oxidation in marine, chemical processing, and food-grade applications. With its UNC coarse threads and Class 3A fit, installation is streamlined while maintaining vibration resistance in machinery, structural frameworks, and equipment assembly. The hex drive design ensures secure tool engagement during high-torque applications, reducing installation time and improving workplace safety. These fully threaded screws provide consistent clamping force across the entire fastener length, making them ideal for securing thick materials or components requiring uniform pressure distribution.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision tolerance. Features include: 1/2"-13 UNC coarse threads, 2" fully threaded length, 82° countersink angle, and 5/16" hex drive. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.