S-92186A599 5/16"-18 x 4" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial and marine environments
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing performance
• Secure fastening and easy installation with external hex drive and standard 1/2" head width for common tool compatibility
• Optimized thread engagement through UNC coarse threading and Class 2A fit, reducing cross-threading risks in assembly
• Versatile partial threading design on a 4" length, allowing precise clamping control in varied material thicknesses
• Long-term durability with right-hand thread direction ensuring stable performance under vibration and dynamic loads
• Regulatory compliance assurance meeting ASME B18.2.1 specifications and RoHS 3/REACH environmental standards

Professional Applications & Engineering Value

This 5/16"-18 UNC hex head screw in 316 stainless steel addresses critical challenges in industrial settings where corrosion and mechanical stress are prevalent. The coarse thread design ensures rapid installation and superior holding power in soft materials or where vibration resistance is crucial, while the partial threading allows for precise unthreaded shank sections to act as dowels or pivot points. With its external hex drive and standardized dimensions, it integrates seamlessly into existing maintenance protocols and tooling systems. Engineers value its consistent performance in structural assemblies, machinery frames, and outdoor equipment, where the combination of 70,000 psi tensile strength and Class 2A thread fit guarantees reliable fastening without galling or seizing, even after repeated disassembly.

Specification Summary & Compliance

This fastener adheres to ASME B18.2.1 dimensional standards with a Class 2A thread fit for consistent interchangeability. The UNC coarse thread (5/16"-18) and 4" length provide standardized compatibility across inch-system applications. It is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, ensuring environmental safety and material traceability for global supply chains.