S-93190A356 5/16"-24 x 2 1/2" 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 marine, chemical, and outdoor applications.
• High tensile strength of 70,000 PSI ensures reliable performance under significant load and stress, reducing the risk of fastener failure.
• Fine UNF thread spacing (24 TPI) provides a tighter, more secure fit with improved vibration resistance compared to coarse threads.
• Class 2A thread fit offers consistent, easy assembly without sacrificing strength, streamlining production and maintenance.
• External hex drive and hex head design allows for high-torque installation with standard tools, enabling quick and secure fastening.
• Full threading along the 2 1/2" length maximizes grip and adjustability, offering versatile placement in various material thicknesses.
• Rockwell B70 hardness provides excellent durability and wear resistance, extending the screw's service life in demanding conditions.

Professional Applications & Engineering Value

This 316 stainless steel hex head screw is engineered to solve critical challenges in industrial settings where corrosion and mechanical stress are prevalent. The UNF fine thread design ensures a precise, leak-resistant seal in high-vibration machinery, while the external hex drive facilitates efficient installation in confined spaces. Its high tensile strength and Rockwell B70 hardness make it suitable for structural applications, such as assembling chemical processing equipment, marine hardware, and food-grade machinery, where long-term reliability and compliance with strict industry standards are paramount. By combining robust material properties with precise Class 2A thread tolerances, this screw minimizes maintenance downtime and enhances operational safety.

Specification Summary & Compliance

This product adheres to ASME B18.2.1 dimensional standards, ensuring interchangeability and reliable performance. The thread fit is Class 2A with a UNF fine thread profile (5/16"-24), providing consistent engagement and ease of assembly. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting environmentally responsible procurement for industrial applications.