S-92198A692 5/16"-18 x 2 1/4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and extended service life
• High-strength performance delivering 80,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Secure and reliable fastening ensured by the Class 2A thread fit, providing consistent engagement and vibration resistance
• Efficient installation and removal with the external hex drive and standard 1/2" head width for common tool compatibility
• Optimized load distribution through the partially threaded design, reducing stress concentration on the shank
• Industry-standard compatibility with 5/16"-18 UNC coarse threads, ensuring interchangeability and easy sourcing
• Regulatory compliance and safety meeting ASME B18.2.1 specifications, RoHS 3, and REACH environmental standards

Professional Applications & Engineering Value

This 5/16"-18 UNC hex head screw is engineered to address critical challenges in industrial assembly and heavy-duty machinery. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it suitable for outdoor equipment, marine components, and chemical processing facilities where moisture and corrosive agents are prevalent. The partially threaded configuration allows for precise clamp load control, preventing joint loosening under dynamic loads and vibration. With its coarse thread design and Class 2A thread fit, it ensures quick installation and reliable performance in structural steel frameworks, conveyor systems, and automotive assemblies, reducing maintenance downtime and enhancing operational safety.

Specification Summary & Compliance

This hex head screw features a 2-1/4" length with a minimum thread length of 7/8", manufactured to Class 2A thread fit tolerances for consistent quality. It conforms to ASME B18.2.1 standards for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in various industrial and commercial applications.