S-90128A859 5-40 x 1/2" 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 applications, reducing the risk of fastener failure.
- Superior corrosion resistance from zinc plating protects against rust and extends service life in harsh industrial environments.
- Precise Class 3A thread fit provides consistent engagement and vibration resistance, minimizing loosening over time.
- High hardness rating (Rockwell C37) offers excellent wear resistance and durability under repetitive loads.
- Hex socket drive design allows for easy installation with standard tools, improving assembly efficiency.
- Fully threaded body ensures maximum grip and uniform load distribution along the entire length.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global supply chains.
Professional Applications & Engineering Value
These 5-40 UNC socket head cap screws are engineered to address critical fastening challenges in demanding sectors like machinery, automotive, and aerospace. The zinc-plated alloy steel construction combats corrosion while maintaining structural integrity, ideal for components exposed to moisture or chemicals. With a coarse thread spacing and Class 3A thread fit, they provide superior clamping force and resistance to vibrational loosening in dynamic assemblies. The hex drive enables high-torque installation without slippage, ensuring secure connections in tight spaces. These screws deliver reliable performance in applications requiring high-strength fasteners with consistent dimensional accuracy, reducing maintenance needs and enhancing operational safety.
Specification Summary & Compliance
This product features a 5-40 UNC thread with Class 3A fit for precise tolerance, a 1/2" length, and coarse thread spacing. It meets ASTM A574 specifications for high-strength alloy steel socket head cap screws and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and quality in industrial use.
