S-90128A583 5/16"-18 x 1" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With 170,000 psi tensile strength, it provides reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior Corrosion Resistance – Zinc-plated alloy steel construction offers enhanced protection against rust and environmental wear, extending service life in harsh conditions.
• Precise Thread Fit – Class 3A thread ensures tight, secure fastening with minimal play, ideal for applications requiring high vibration resistance and accuracy.
• Easy Installation with Hex Drive – 1/4" hex drive allows for straightforward installation and removal using standard tools, saving time and labor costs.
• Consistent Full Threading – Fully threaded design provides uniform load distribution along the entire length, improving joint integrity and assembly reliability.
• High Hardness for Durability – Rockwell C37 hardness ensures the screw maintains its shape and performance under repeated use and mechanical stress.
• Broad Industrial Compliance – Meets ASTM A574 standards and is RoHS 3 and REACH compliant, ensuring safety and regulatory acceptance in global markets.

Professional Applications & Engineering Value

This 5/16"-18 UNC socket head cap screw is engineered to address common industrial challenges, such as vibration loosening and corrosion in demanding environments. Made from zinc-plated alloy steel, it combines high tensile strength (170,000 psi) with excellent corrosion resistance, making it suitable for machinery, automotive assemblies, and heavy equipment where reliability is critical. The Class 3A thread fit and coarse thread design ensure secure fastening even under dynamic loads, while the standard socket head and 1/4" hex drive facilitate quick installation in confined spaces. By meeting ASTM A574 specifications, it delivers consistent quality for industrial applications, reducing maintenance needs and enhancing operational efficiency.

Specification Summary & Compliance

This product features precise Class 3A thread fit with UNC coarse threads, a length of 1", and a head diameter of 15/32". It complies with ASTM A574 manufacturing standards and is verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations for industrial use.