S-90128A101 2-56 x 1" 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 under high-stress conditions, reducing the risk of fastener failure.
- Superior corrosion resistance provided by zinc plating protects against rust and extends service life in harsh industrial environments.
- Precise Class 3A thread fit guarantees secure, vibration-resistant assemblies with minimal play, enhancing joint integrity.
- High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated installations.
- Standard hex socket drive (5/64") allows for easy installation with common tools, speeding up assembly processes.
- Coarse UNC threads enable quick engagement and reduced cross-threading risk, ideal for rapid production lines.
- Compliance with ASTM A574 ensures consistent quality and mechanical properties, meeting rigorous industrial standards.
Professional Applications & Engineering Value
This 2-56 UNC Socket Head Cap Screw is engineered for demanding applications where high tensile strength and corrosion resistance are critical. The zinc-plated alloy steel construction provides durability in environments exposed to moisture and chemicals, while the Class 3A thread fit ensures tight, reliable connections in precision assemblies like machinery, automotive components, and electronic enclosures. Its partially threaded design allows for controlled clamping force, preventing over-torque and material damage. Ideal for industrial fastening in aerospace, manufacturing, and equipment maintenance, this screw addresses common issues like vibration loosening and premature wear, delivering long-term performance and reduced maintenance costs.
Specification Summary & Compliance
This screw features a 2-56 UNC coarse thread with Class 3A fit for precise tolerance, a 5/64" hex drive, and a length of 1 inch. It complies with ASTM A574 specifications for high-strength socket head cap screws, ensuring consistent mechanical properties. Additionally, it is RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting environmental and safety regulations for industrial use.
