S-90585A833 5/8"-11 x 1 3/4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction with passivated finish
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
• Precise flush mounting enabled by 82° countersink angle and standard flat head profile
• High-reliability threading with Class 3A thread fit ensuring secure fastening in critical assemblies
• Easy installation and removal with 3/8" hex drive design for efficient torque transmission
• Full threading coverage along the 1-3/4" length provides maximum grip and load distribution
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations (RoHS 3, REACH)

Professional Applications & Engineering Value

These 316 stainless steel flat head screws deliver critical performance advantages in demanding industrial environments where corrosion resistance and structural integrity are paramount. The combination of UNC coarse threading and Class 3A thread fit ensures rapid installation with exceptional vibration resistance, making them ideal for machinery, marine equipment, and chemical processing applications. The passivated finish enhances the natural corrosion resistance of 316 stainless steel, providing extended service life in acidic or saltwater exposures. With full threading along the entire shank, these hex drive screws distribute clamping forces evenly, preventing joint failure in high-stress assemblies while the 82° countersink creates seamless flush surfaces for aerodynamic or safety-critical applications.

Specification Summary & Compliance

This 5/8"-11 UNC flat head screw maintains precise dimensional control with Class 3A thread fit tolerances and standard 82° countersink angle. Manufactured in compliance with ASME B18.3 specifications, the fastener meets rigorous mechanical and dimensional standards. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, ensuring restricted substance compliance for global industrial applications. The fully threaded design with coarse thread spacing provides optimal engagement in various materials while maintaining the high 70,000 psi tensile strength characteristic of 316 stainless steel construction.