S-93516A205 5/8"-11 x 1 1/4" ASME B18.2.1 Bronze Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance in harsh environments due to 651 Silicon Bronze composition, ideal for marine and chemical applications
• High tensile strength of 70,000 psi ensures reliable load-bearing capacity for heavy-duty industrial assemblies
• Rockwell B70 hardness provides superior wear resistance and durability under mechanical stress
• Fully threaded UNC coarse design delivers faster installation and enhanced grip in various materials
• Class 2A thread fit guarantees consistent, precise engagement with standard nuts and tapped holes
• External hex drive allows for high-torque application with common tools, reducing installation time
• Compliance with ASME B18.2.1, RoHS 3, and REACH ensures safety, environmental responsibility, and global regulatory acceptance

Professional Applications & Engineering Value

This 651 Silicon Bronze hex head screw addresses critical challenges in demanding sectors like marine construction, offshore platforms, and chemical processing plants. Its silicon bronze alloy inherently resists saltwater corrosion and galvanic degradation, preventing fastener failure in humid or acidic conditions. The UNC coarse thread profile and fully threaded design provide maximum pull-out resistance in wood, soft metals, and composite materials, reducing the risk of loosening under vibration. With a 70,000 psi tensile strength and external hex drive, it supports high-stress applications while enabling efficient installation with standard wrenches. Engineers specify this screw for marine-grade fastening, water treatment systems, and architectural metalwork where long-term reliability and regulatory compliance are non-negotiable.

Specification Summary & Compliance

This screw maintains Class 2A thread fit per UNC standards, ensuring dimensional accuracy and interchangeability. Manufacturing adheres to ASME B18.2.1 specifications for hex head bolts, guaranteeing consistent mechanical properties. The product is verified as RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming the absence of restricted hazardous substances and supporting sustainable procurement practices.