S-92949A591 5/16"-18 x 2" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
• Superior mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under heavy loads
• Precision thread engagement with Class 3A thread fit ensuring secure, vibration-resistant fastening in critical applications
• Efficient installation and removal through hex drive design providing maximum torque transfer and reduced tool slippage
• Optimized for coarse threading applications with 5/16"-18 UNC threads delivering faster assembly and better performance in softer materials
• Full 2" threading coverage enabling consistent grip strength across the entire fastener length for uniform clamping force
• Comprehensive regulatory compliance meeting ASME B18.3 standards plus RoHS 3 and REACH environmental regulations

Professional Applications & Engineering Value

This 18-8 stainless steel rounded head screw delivers exceptional engineering value in demanding industrial environments where corrosion resistance and mechanical reliability are paramount. The combination of 70,000 psi tensile strength and Class 3A thread fit ensures vibration-resistant fastening in machinery, equipment manufacturing, and structural applications. The passivated finish provides enhanced protection against chemical exposure and atmospheric corrosion, making these hex drive screws ideal for marine, chemical processing, and outdoor applications. The 5/16"-18 UNC coarse threading offers superior performance in softer materials like aluminum and plastics, while the fully threaded design maintains consistent clamping force across the entire 2" length. These industrial screws solve critical fastening challenges where both mechanical strength and environmental durability are required.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 3A thread fit per UNC specifications, ensuring tight tolerances for critical applications. The screw features 5/16"-18 UNC coarse threading with right-hand direction and full 2" threading. Compliance includes ASME B18.3 dimensional standards, RoHS 3 (2015/863/EU) compliance for restricted substances, and REACH (EC 1907/2006) compliance for chemical safety. The inch system measurement ensures compatibility with North American industrial standards and equipment.