S-92186A611 5/16"-18 x 8" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 316 stainless steel construction, ideal for harsh environments and chemical exposure
• Reliable high-strength performance with 70,000 PSI tensile strength and Rockwell B70 hardness for demanding applications
• Secure and precise fastening ensured by Class 2A thread fit and UNC coarse thread design for easier assembly
• Optimized for industrial use with a partially threaded shank that provides superior grip and vibration resistance
• Easy installation and removal with a standard 1/2" external hex head design for common wrench tools
• Compliance with major standards including ASME B18.2.1, RoHS 3, and REACH for quality assurance and regulatory safety
• Durable long-term performance with a robust 8" length and coarse thread spacing that resists loosening under stress

Professional Applications & Engineering Value

This 5/16"-18 UNC hex head screw is engineered to solve critical fastening challenges in industrial applications where corrosion and mechanical stress are prevalent. Made from 316 stainless steel, it offers superior resistance to chemicals, saltwater, and extreme temperatures, making it ideal for marine, chemical processing, and outdoor infrastructure. The partially threaded design concentrates clamping force where needed, reducing the risk of joint failure under vibration or dynamic loads. With an external hex drive and coarse thread, installation is quick and secure, even in hard-to-reach areas. This screw delivers reliable performance in heavy-duty assemblies, from machinery frames to structural supports, ensuring long-term integrity and reduced maintenance costs.

Specification Summary & Compliance

This screw features a Class 2A thread fit per UNC standards, ensuring precise dimensional accuracy and interchangeability. It is manufactured to meet ASME B18.2.1 specifications for hex head screws and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility. Key dimensions include a thread size of 5/16"-18, a length of 8", and a head width of 1/2".