S-90044A171 1/2"-20 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.
- Superior corrosion resistance from the black-oxide finish prolongs service life in demanding industrial environments.
- Precision Class 3A thread fit provides tight tolerances and secure fastening for critical applications requiring minimal play.
- Fully threaded design offers consistent engagement along the entire length, enhancing load distribution and holding power.
- High hardness (Rockwell C37) increases wear resistance, maintaining thread integrity through repeated use.
- Standard hex drive (3/8") allows for easy installation with common tools, improving assembly efficiency.
- Compliance with RoHS 3 and REACH ensures environmental safety and meets international regulatory standards for industrial components.
Professional Applications & Engineering Value
Engineered for precision and durability, these black-oxide alloy steel socket head cap screws address common industrial challenges such as vibration loosening and material fatigue. The UNRF fine threads with Class 3A fit deliver superior clamping force and alignment in machinery, automotive, and aerospace assemblies, where exact tolerances are critical. The high tensile strength and corrosion-resistant coating make them ideal for heavy-duty applications, reducing maintenance needs and extending equipment lifespan. By combining robust ASTM A574 compliance with a fully threaded design, these screws provide reliable performance in dynamic load environments, ensuring long-term operational stability.
Specification Summary & Compliance
This socket head cap screw meets precise dimensional standards, including Class 3A thread fit and UNRF fine threads for accurate engagement. Manufactured in accordance with ASTM A574 specifications, it ensures consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and use in industrial settings.
