S-91274A104 10-24 x 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 needs.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections, enhancing assembly integrity and reducing loosening.
• High hardness (Rockwell C37) provides excellent wear resistance, maintaining thread integrity through repeated use and disassembly.
• Fully threaded design allows for consistent clamping force along the entire length, improving fastening reliability in varied material thicknesses.
• Standard hex drive compatibility with 5/32" tools enables easy installation and removal, speeding up assembly processes.
• Compliance with ASME B18.3 and ASTM A574 ensures consistent quality and interchangeability, simplifying procurement and inventory management.

Professional Applications & Engineering Value

This 10-24 UNC thread socket head cap screw is engineered to address critical fastening challenges in demanding industrial settings. The zinc-flake-coated alloy steel construction provides robust protection against corrosion, making it ideal for machinery, automotive, and outdoor equipment exposed to moisture and chemicals. Its coarse thread design facilitates quick assembly in softer materials or where vibration resistance is paramount, while the Class 3A thread fit ensures tight tolerances for secure connections in precision applications. The fully threaded rod and high tensile strength deliver uniform clamping force, preventing joint failure in dynamic loads. Commonly used in industrial screws for heavy-duty frames, engine components, and structural assemblies, it combines durability with regulatory compliance to meet rigorous engineering standards.

Specification Summary & Compliance

This socket head cap screw adheres to Class 3A thread fit per UNC standards, ensuring precise dimensional accuracy. It meets ASME B18.3 for socket head cap screws and ASTM A574 for alloy steel material specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable industrial use. Thread specifications include a 10-24 UNC coarse thread with right-hand direction, and the zinc-flake coating is tested per ASTM B117 for corrosion resistance.