S-90044A250 3-56 x 3/4" 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.
- Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant connections in critical assemblies.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in demanding industrial environments.
- Fine UNF thread design allows for finer adjustments and improved load distribution, ideal for precision engineering applications.
- Hex socket drive enables easy installation with standard tools, minimizing stripping and ensuring consistent torque application.
- Full compliance with ASTM A574 guarantees material quality and manufacturing consistency for dependable fastening solutions.
- RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global supply chain integration.
Professional Applications & Engineering Value
Engineered for precision and durability, this 3-56 UNF thread socket head cap screw addresses common industrial challenges such as vibration loosening and material fatigue. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness, provides excellent wear resistance and structural integrity under dynamic loads. Its fine thread and Class 3A fit ensure minimal backlash and secure fastening in compact assemblies, making it ideal for machinery, automotive components, and electronic enclosures where space and reliability are critical. The hex drive socket head facilitates quick installation in confined areas, reducing assembly time while maintaining high clamp force.
Specification Summary & Compliance
This socket head cap screw features a 3-56 UNF fine thread with Class 3A tolerance for precise fit, and is manufactured in accordance with ASTM A574 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards. The inch-based dimensions include a 3/4" length and 5/64" hex drive, providing consistent performance in metric-context applications where imperial fasteners are specified.
