S-92186A559 5/8"-18 x 3" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance in harsh environments due to 316 stainless steel construction
• Superior mechanical strength with 70,000 psi tensile strength for reliable load-bearing performance
• Optimized thread engagement through Class 2A thread fit ensuring precise assembly and vibration resistance
• Enhanced durability with Rockwell B70 hardness providing excellent wear resistance
• Secure installation facilitated by external hex drive design for high-torque applications
• Versatile partial threading allowing both clamping and alignment functions in structural applications
• Regulatory compliance meeting ASME B18.2.1 standards for dimensional accuracy and quality assurance

Professional Applications & Engineering Value

This 316 stainless steel hex head screw delivers exceptional performance in demanding industrial environments where corrosion resistance and mechanical reliability are paramount. The UNF fine thread spacing provides superior vibration resistance compared to coarse threads, making it ideal for machinery, marine equipment, and chemical processing applications. The partially threaded design combines the benefits of precise clamping with unthreaded shank strength, preventing joint loosening under dynamic loads. With its external hex drive and substantial 15/16" head width, this fastener accommodates high installation torque while the 3" length and 1 1/2" minimum thread length ensure sufficient engagement in thick materials. The combination of 70,000 psi tensile strength and Rockwell B70 hardness provides reliable performance in structural applications where both strength and corrosion resistance are critical requirements.

Specification Summary & Compliance

This 5/8"-18 UNF hex head screw features Class 2A thread fit tolerance for precise assembly and maintains dimensional compliance with ASME B18.2.1 standards. The inch system measurement ensures compatibility with North American industrial equipment. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental directives, confirming the absence of restricted substances. The right-hand thread direction and fine thread spacing provide standardized installation characteristics for consistent performance across industrial applications.