S-93516A591 5/16"-18 x 2" ASME B18.2.1 Bronze Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance for extended service life in harsh marine and chemical environments
• High tensile strength (70,000 psi) provides reliable load-bearing capacity for structural applications
• Rockwell B70 hardness ensures excellent wear resistance and durability under repeated stress
• Coarse UNC threading with Class 2A fit enables quick installation and secure fastening in various materials
• Full threading along 2" length offers maximum adjustability and grip range
• External hex drive design allows for high-torque application with standard tools
• Compliance with major standards including ASME B18.2.1, RoHS 3, and REACH for quality assurance

Professional Applications & Engineering Value

These 651 silicon bronze hex head screws deliver exceptional performance where corrosion is a primary concern. The marine-grade bronze composition provides inherent resistance to saltwater corrosion, making them ideal for boat building, dock hardware, and coastal infrastructure. The UNC coarse thread pattern with Class 2A fit ensures reliable engagement in wood, plastic, and soft metals without stripping. With 70,000 psi tensile strength and Rockwell B70 hardness, these fully threaded fasteners maintain structural integrity in high-vibration industrial equipment and outdoor applications where environmental factors would degrade standard steel fasteners.

Specification Summary & Compliance

This 5/16"-18 UNC hex head screw features precise Class 2A thread fit tolerances and coarse thread spacing per unified thread standards. Manufacturing complies with ASME B18.2.1 dimensional requirements, ensuring interchangeability and proper function. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations concerning chemical safety, making them suitable for regulated industrial and international applications.