S-92198A699 5/16"-18 x 4" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments.
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B70 hardness for reliable, heavy-duty performance.
• Secure and precise fastening ensured by the Class 2A thread fit and coarse UNC thread for easier engagement and vibration resistance.
• Optimized for high-torque applications featuring an external hex drive and standard hex head for straightforward installation with common tools.
• Versatile partial threading allows for a firm grip on materials while leaving a smooth shank section for precise alignment.
• Guaranteed dimensional consistency and interchangeability, manufactured to meet the rigorous ASME B18.2.1 standard.
• Safe for regulated industries with full compliance to RoHS 3 and REACH environmental directives.

Professional Applications & Engineering Value

This 5/16"-18 UNC Hex Head Screw is engineered from 18-8 Stainless Steel to solve critical challenges in demanding applications such as machinery assembly, structural frameworks, and outdoor equipment. The material's inherent corrosion resistance combats degradation from moisture and chemicals, extending service life. The coarse UNC thread and Class 2A fit provide excellent engagement in a variety of materials, reducing the risk of cross-threading and ensuring a reliable, vibration-resistant connection. The 4" length with a partially threaded design offers the ideal balance, where the threaded portion secures the joint while the unthreaded shank bears shear loads effectively, making it a fundamental component for robust and durable industrial fastening solutions.

Specification Summary & Compliance

This screw features a 5/16"-18 UNC thread with a Class 2A thread fit, ensuring precise dimensional tolerances for reliable assembly. It is manufactured in accordance with the ASME B18.2.1 standard, guaranteeing consistency and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to strict environmental and safety standards for use in various industrial and international markets.