S-92186A592 5/16"-18 x 2 1/4" ASME B18.2.1 Super-Corrosion-Resistant 316 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction, ideal for chemical processing and marine applications
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration, reducing the risk of fastener failure
• Rockwell B70 hardness provides excellent durability and resistance to wear, extending the service life of your assemblies
• UNC coarse threading allows for faster installation and better performance in softer materials or where debris is present
• Class 2A thread fit offers consistent, free-spinning assembly with standard nuts for efficient production line operations
• External hex drive design enables high-torque installation with common tools, simplifying maintenance and reducing assembly time
• Compliance with ASME B18.2.1, RoHS 3, and REACH guarantees material quality and environmental safety for regulated industries

Professional Applications & Engineering Value

This 316 stainless steel hex head screw is engineered to solve critical challenges in demanding industrial settings. Its UNC coarse thread and partial threading provide optimal grip in structural applications while minimizing cross-threading risks. The external hex drive accommodates high torque requirements for secure fastening in heavy machinery, chemical processing equipment, and offshore installations. With exceptional corrosion resistance against chlorides and acidic environments, this fastener delivers long-term reliability in wastewater treatment plants, marine hardware, and food processing facilities where material integrity is paramount. The combination of 70,000 psi tensile strength and controlled hardness ensures consistent performance in vibration-prone applications while maintaining ductility for impact resistance.

Specification Summary & Compliance

This 5/16"-18 UNC hex head screw features Class 2A thread fit per ASME B18.2.1 specifications, ensuring dimensional accuracy and interchangeability. The 2 1/4" length with 7/8" minimum thread length provides sufficient engagement for secure connections. Manufacturing complies with ASME B18.2.1 standards for dimensional consistency and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming restriction of hazardous substances for global market acceptance.