S-90044A318 1/4"-28 x 2 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 under high-stress conditions, reducing the risk of fastener failure.
- Precision Class 3A thread fit provides superior engagement and vibration resistance, maintaining secure connections in dynamic applications.
- Black-Oxide finish on Alloy Steel offers enhanced corrosion resistance and a durable, low-glare surface for extended service life.
- Fine UNF thread design allows for finer adjustments and improved load distribution compared to coarse threads.
- Hex socket drive enables high torque application and easy installation in confined spaces, minimizing tool slippage.
- Full threading along the 2-1/2" length provides consistent holding power and flexibility in various assembly depths.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global industrial use.
Professional Applications & Engineering Value
Engineered for demanding environments, these Socket Head Cap Screws with Black-Oxide Alloy Steel construction address critical needs in machinery, automotive, and aerospace sectors. The fine UNF thread and Class 3A fit ensure tight tolerances, reducing loosening from vibrations and enhancing assembly integrity. With a Rockwell C37 hardness and high tensile strength, they withstand heavy loads and repetitive stress, ideal for precision equipment and structural applications where reliability is paramount. The hex drive design facilitates efficient installation, saving time in high-volume production lines while meeting strict industry standards.
Specification Summary & Compliance
This screw features a 1/4"-28 UNF fine thread with Class 3A precision fit, ensuring exact dimensional accuracy per unified thread standards. Manufactured in accordance with ASTM A574 specifications, it includes full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its suitability for environmentally conscious and safe industrial use.
