S-91274A332 3/8"-16 x 2 1/2" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc-flake coating extends service life in harsh industrial environments, minimizing maintenance and replacement costs.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections, enhancing assembly integrity and safety.
• High hardness (Rockwell C37) provides excellent wear resistance, maintaining thread integrity through repeated use and high torque.
• Coarse UNC threading enables quick and easy installation, reducing assembly time and labor in maintenance and production.
• Partially threaded design allows for optimal clamping force distribution, ideal for applications requiring precise joint control.
• Compliance with ASME B18.3 and ASTM A574 ensures consistent quality and interchangeability, supporting standardized engineering requirements.

Professional Applications & Engineering Value

This socket head cap screw is engineered to address critical challenges in heavy-duty industrial settings, where corrosion resistance and high tensile strength are paramount. The zinc-flake-coated alloy steel construction combats rust and chemical exposure, making it suitable for machinery, automotive, and construction applications exposed to moisture or aggressive conditions. Its UNC coarse thread and Class 3A fit provide reliable engagement in materials like steel and aluminum, reducing the risk of cross-threading and ensuring stable fastening under dynamic loads. With a 5/16" hex drive, it allows for high-torque installation without stripping, streamlining assembly in confined spaces. This screw delivers long-term durability and performance, minimizing downtime and enhancing operational efficiency in demanding environments.

Specification Summary & Compliance

This product adheres to Class 3A thread fit for precise dimensional accuracy and UNC coarse thread standards with a size of 3/8"-16. It meets ASME B18.3 and ASTM A574 manufacturing specifications, ensuring consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmental safety and regulatory requirements for industrial use.