S-93190A591 5/16"-18 x 2" 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 environments and chemical exposure
• High tensile strength of 70,000 psi ensures reliable load-bearing capacity and joint integrity under stress
• Rockwell B70 hardness provides excellent durability and resistance to wear, deformation, and galling
• Coarse UNC threading with Class 2A fit offers faster assembly, easier alignment, and reliable performance in various materials
• Full 2" threading maximizes grip length and load distribution across the entire fastener
• External hex drive design allows for high-torque installation with standard tools and secure, slip-resistant engagement
• Compliance with ASME B18.2.1, RoHS, and REACH guarantees quality, safety, and environmental regulatory adherence

Professional Applications & Engineering Value

This 5/16"-18 UNC hex head screw in 316 stainless steel is engineered to address critical challenges in demanding industrial settings. Its coarse thread design and Class 2A thread fit ensure rapid, secure fastening in structural assemblies, machinery, and marine equipment, reducing installation time and minimizing cross-threading risks. The fully threaded 2" length provides consistent clamping force across the entire shank, enhancing joint stability in high-vibration environments. With exceptional corrosion resistance, it performs reliably in chemical processing, offshore, and food-grade applications where moisture and aggressive agents are present. The external hex drive facilitates high-torque applications with common tools, making it a versatile choice for maintenance, construction, and OEM manufacturing.

Specification Summary & Compliance

This hex head screw features a 5/16"-18 UNC coarse thread with Class 2A thread fit per standard inch system tolerances, ensuring precise engagement and interchangeability. It is manufactured in compliance with ASME B18.2.1 specifications for dimensional accuracy and mechanical properties. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for hazardous substances.