S-95362A640 3/4"-10 x 3" ASME B18.2.1, SAE J429, ASTM A354BD, MS90728-191 Mil. Spec. High-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With a 150,000 psi rating, this screw withstands extreme loads, reducing the risk of fastener failure in critical applications.
• Superior Corrosion Resistance – The zinc yellow-chromate plating provides a durable barrier against rust and environmental degradation, extending service life in harsh conditions.
• High Hardness for Durability – Rockwell C33 hardness ensures the screw maintains its shape and thread integrity under high stress and repeated use.
• Reliable Thread Engagement – UNC coarse threads and Class 2A fit offer quick assembly and secure fastening, minimizing cross-threading and loosening.
• Heavy-Duty Material Compliance – Made from Grade 8 steel, it meets rigorous standards for high-strength applications, ensuring consistent performance.
• Easy Installation with External Hex Drive – The hex head design allows for straightforward tightening with common tools, speeding up assembly processes.
• Partial Threading for Versatility – Enables precise clamping force distribution, ideal for applications where unthreaded shank strength is needed.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address common industrial challenges, such as vibration-induced loosening and corrosion in demanding environments. The zinc yellow-chromate plated finish enhances longevity by resisting moisture and chemicals, while the UNC coarse thread and Class 2A fit ensure reliable engagement in materials like steel and heavy machinery components. Its 150,000 psi tensile strength and Rockwell C33 hardness make it suitable for heavy-duty applications, including construction equipment, automotive assemblies, and structural frameworks, where failure is not an option. By complying with ASME B18.2.1 and other standards, it delivers consistent performance, reducing downtime and maintenance costs in industrial fastening systems.

Specification Summary & Compliance

This screw features precise Class 2A thread fit and UNC coarse threading with a 3/4"-10 size, ensuring dimensional accuracy per ASME B18.2.1, SAE J429, and ASTM A354BD specifications. It is REACH compliant (EC 1907/2006) and adheres to MS90728-191 standards, confirming its suitability for regulated industrial use without hazardous substances.