S-90128A044 2-56 x 5/16" 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-plated alloy steel construction extends service life in demanding industrial environments.
- Precise Class 3A thread fit guarantees secure, vibration-resistant assemblies with minimal risk of loosening.
- Hex socket drive design allows for high-torque installation and easy access in confined spaces.
- Full threading provides consistent clamping force along the entire screw length for uniform load distribution.
- Rockwell C37 hardness maintains thread integrity and prevents stripping during repeated installations.
- Compliance with ASTM A574 ensures consistent quality and performance across production batches.
Professional Applications & Engineering Value
This 2-56 UNC Socket Head Cap Screw delivers critical engineering value through its zinc-plated alloy steel construction and Class 3A thread fit, specifically engineered to address common industrial challenges. The coarse UNC thread profile enables rapid assembly while resisting vibration-induced loosening in machinery, automotive, and electronic enclosures. The hex drive socket head design accommodates high torque applications where space constraints prohibit standard wrench access. With 170,000 psi tensile strength and full threading, this fastener distributes clamping forces evenly across joined components, preventing joint failure in dynamic load conditions. Ideal for precision equipment requiring reliable, repeatable fastening solutions.
Specification Summary & Compliance
This socket head cap screw features 2-56 UNC coarse threads with Class 3A fit for precision tolerance, 5/16" length, and 5/64" hex drive. Manufactured to ASTM A574 specifications, it maintains dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets.
