S-98164A541 1/2"-13 x 1" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction with passivated finish
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Precise thread engagement ensured by Class 3A thread fit and UNC coarse threading for reliable fastening
• Easy installation and removal with 5/16" hex drive design providing secure tool grip
• Full threading coverage along the 1" length for maximum holding power and adjustment flexibility
• Compliant with major industrial standards including ASME B18.3, RoHS 3, and REACH for quality assurance
• Rounded button head profile offers a finished appearance while reducing surface snagging

Professional Applications & Engineering Value

This 316 stainless steel rounded head screw delivers exceptional value in corrosive or high-moisture environments where standard fasteners fail. The combination of Class 3A UNC coarse threads and fully threaded design ensures maximum thread engagement and vibration resistance in industrial equipment, marine hardware, and chemical processing applications. The passivated finish enhances the natural corrosion resistance of 316 stainless steel, while the 5/16" hex drive allows for high-torque installation without stripping. Engineered to meet ASME B18.3 specifications, these rounded head screws provide reliable performance where both mechanical strength and environmental durability are critical.

Specification Summary & Compliance

This 1/2"-13 UNC screw features precise Class 3A thread fit with coarse thread spacing, manufactured to ASME B18.3 standards where identified under ASTM F879. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.