S-90128A917 3/4"-10 x 2 3/4" ASTM A574 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.
• Corrosion-resistant zinc plating on alloy steel provides enhanced durability and longevity, even in harsh industrial environments.
• Class 3A thread fit offers superior precision and tight tolerances for secure, vibration-resistant assemblies.
• Coarse UNC threading allows for faster installation and easier alignment, saving time during assembly processes.
• 5/8" hex drive design enables high torque application with standard tools, minimizing slippage and improving installation efficiency.
• Full threading along the 2 3/4" length provides consistent holding power and flexibility in various material thicknesses.
• Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global industrial use.

Professional Applications & Engineering Value

This zinc-plated alloy steel socket head cap screw is engineered to address critical fastening challenges in heavy machinery, automotive, and construction sectors. The Rockwell C37 hardness and 170,000 PSI tensile strength provide exceptional resistance to shear and tensile forces, preventing joint failure under dynamic loads. The 3/4"-10 UNC coarse thread with Class 3A fit ensures precise engagement in tapped holes, reducing the risk of cross-threading and maintaining clamp load in vibrating environments. The zinc plating offers a protective barrier against corrosion, extending service life in outdoor or humid conditions. Ideal for high-stress industrial applications, this screw delivers reliable performance where safety and durability are paramount.

Specification Summary & Compliance

This socket head cap screw features a 3/4"-10 UNC coarse thread with Class 3A thread fit for high precision. It is manufactured from zinc-plated alloy steel with a tensile strength of 170,000 PSI and Rockwell C37 hardness. The product complies with ASTM A574 specifications for material and mechanical properties, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring it is free from hazardous substances and suitable for regulated industries.