S-93516A198 1/2"-20 x 1 1/2" ASME B18.2.1 Bronze Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in marine and harsh environments thanks to 651 Silicon Bronze material composition
• Exceptional mechanical strength with 70,000 PSI tensile strength and Rockwell B70 hardness for demanding applications
• Precise thread engagement with UNF fine threading and Class 2A fit ensuring reliable, vibration-resistant connections
• Optimized drive performance through external hex head design providing secure tool engagement and high torque capability
• Full threading coverage along the 1½" length for maximum grip and load distribution across the entire fastener
• Industry-standard compliance meeting ASME B18.2.1 specifications for dimensional accuracy and performance reliability
• Environmental regulation adherence with RoHS 3 and REACH compliance for safe, sustainable industrial use

Professional Applications & Engineering Value

These silicon bronze hex head screws are engineered specifically for challenging environments where corrosion resistance and structural integrity are paramount. The 651 Silicon Bronze composition provides exceptional protection against saltwater corrosion and chemical exposure, making these UNF fine thread fasteners ideal for marine hardware, coastal infrastructure, and chemical processing equipment. The Class 2A thread fit ensures precise mating with tapped holes while accommodating minor variations in assembly conditions. With 70,000 PSI tensile strength and Rockwell B70 hardness, these fully threaded fasteners maintain clamping force under vibration and load cycling, preventing joint failure in critical applications. The external hex drive design facilitates installation in confined spaces while providing sufficient torque transmission for secure fastening.

Specification Summary & Compliance

This 1/2"-20 UNF hex head screw features Class 2A thread fit per unified thread standards, ensuring proper clearance and engagement with mating components. Manufacturing conforms to ASME B18.2.1 specifications for dimensional accuracy and mechanical properties. The fastener is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations concerning chemical safety, making it suitable for global industrial applications with environmental compliance requirements.