S-90128A112 4-40 x 5/8" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Zinc-plated alloy steel construction provides excellent corrosion resistance, extending service life in harsh environments.
- Class 3A thread fit offers superior precision and tighter tolerances for secure, vibration-resistant assemblies.
- Rockwell C37 hardness enhances durability and wear resistance, minimizing damage during installation and use.
- Hex drive design with 3/32" drive size allows for easy installation and removal using standard tools, improving assembly efficiency.
- Fully threaded right-hand coarse UNC thread ensures quick engagement and strong holding power in various materials.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations, supporting sustainable procurement.
Professional Applications & Engineering Value
This 4-40 UNC thread socket head cap screw is engineered to address critical fastening challenges in demanding industrial settings. The zinc-plated alloy steel material combats corrosion, making it ideal for machinery, automotive, and electronics applications where exposure to moisture or chemicals is a concern. With a coarse thread and Class 3A fit, it provides rapid assembly and superior clamp load distribution, reducing the likelihood of loosening under vibration. The fully threaded design and high tensile strength ensure consistent performance in heavy-duty fixtures, while the hex drive facilitates precise torque application. These features make it a reliable choice for engineers seeking durable, compliant fasteners that enhance operational safety and reduce maintenance costs.
Specification Summary & Compliance
This socket head cap screw features a 4-40 UNC coarse thread with Class 3A precision fit, ensuring tight tolerances and reliable engagement. It is manufactured in accordance with ASTM A574 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, supporting safe and sustainable usage in global markets.
