S-92186A693 5/16"-18 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
• High-strength performance with 70,000 psi tensile strength for demanding load-bearing applications
• Excellent durability ensured by Rockwell B70 hardness, resisting wear and deformation
• Reliable coarse threading (UNC) for faster installation and reduced cross-threading risk
• Precise Class 2A thread fit ensuring consistent engagement and vibration resistance
• Secure external hex drive for easy torque application with standard tools
• Partial threading design providing optimal grip and shear strength where needed

Professional Applications & Engineering Value

This 5/16"-18 UNC hex head screw in 316 stainless steel is engineered to solve critical challenges in corrosive and high-stress environments. Its coarse thread design enables rapid assembly in structural frameworks, machinery, and marine equipment, while the Class 2A thread fit minimizes loosening under dynamic loads. The external hex drive allows for high-torque installation, making it ideal for maintenance and manufacturing sectors where chemical exposure and moisture are concerns. By combining 70,000 psi tensile strength with partial threading, it delivers focused clamping force without compromising material integrity, ensuring long-term reliability in industrial fastening systems.

Specification Summary & Compliance

This screw adheres to ASME B18.2.1 dimensional standards and features a Class 2A thread fit for consistent precision. It is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations. Specifications include a 2 1/2" length, UNC coarse thread with 0.3125" diameter, and Rockwell B70 hardness, ensuring reliability across regulated industrial applications.