S-90128A749 5/16"-24 x 1" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 PSI ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in critical applications.
• Superior corrosion resistance from zinc-plated alloy steel construction extends service life and maintains integrity in harsh industrial environments.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant connections in machinery and equipment assemblies.
• Fine thread spacing (UNF) offers improved adjustment accuracy and better load distribution compared to coarse threads.
• Hex socket drive design allows for high torque application with standard 1/4" tools, minimizing stripping and enabling easy installation in confined spaces.
• Full threading along the 1" length ensures maximum grip and flexibility in various material thicknesses and assembly configurations.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees consistent quality, material safety, and environmental responsibility for global supply chains.

Professional Applications & Engineering Value

This 5/16"-24 UNF Socket Head Cap Screw is engineered to address common industrial fastening challenges, such as vibration loosening and material fatigue. The zinc-plated alloy steel construction provides excellent durability against corrosion, making it ideal for outdoor equipment, automotive assemblies, and heavy machinery exposed to moisture or chemicals. With its fine thread spacing and Class 3A thread fit, it ensures precise alignment and secure fastening in high-precision applications like aerospace components or manufacturing jigs. The socket head design facilitates easy installation with standard hex keys, reducing assembly time and improving workflow efficiency in tight spaces. By combining high tensile strength and Rockwell C37 hardness, this fastener delivers long-term reliability, minimizing maintenance needs and downtime in demanding industrial settings.

Specification Summary & Compliance

This product features precise Class 3A thread fit per UNF standards, ensuring tight tolerances for secure fastening. It adheres to ASTM A574 specifications for high-strength socket head cap screws, guaranteeing consistent manufacturing quality. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility. With a thread size of 5/16"-24, fine thread spacing, and right-hand thread direction, it meets industry requirements for precision and performance in various engineering applications.