S-90044A213 1 3/4"-5 x 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: Withstands up to 170,000 PSI for reliable performance in high-stress industrial applications.
- Superior Corrosion Resistance: Black-oxide coating on alloy steel provides enhanced durability in harsh environments.
- Precise Thread Fit: UNC coarse threading with Class 2A fit ensures easy installation and secure, vibration-resistant connections.
- High Hardness Rating: Rockwell C37 hardness maintains structural integrity under heavy loads and repeated use.
- Fully Threaded Design: Maximizes grip and load distribution along the entire 4" length for versatile fastening solutions.
- Standard Socket Head: Hex drive (1 1/4") allows for high-torque application with standard tools, reducing assembly time.
- Regulatory Compliance: Meets ASTM A574, RoHS 3, and REACH standards, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, this black-oxide alloy steel socket head cap screw addresses critical challenges in heavy machinery, automotive, and construction assemblies. The UNC coarse thread and Class 2A fit facilitate quick, secure fastening even in high-vibration environments, minimizing loosening risks. Its fully threaded 4" length ensures uniform stress distribution, ideal for applications requiring deep engagement and robust clamping force. The black-oxide surface treatment not only resists corrosion but also reduces galling, extending service life in outdoor or chemically exposed conditions. By combining high tensile strength (170,000 PSI) with regulatory adherence, this fastener delivers reliability where precision and durability are non-negotiable.
Specification Summary & Compliance
This socket head cap screw features a 1 3/4"-5 UNC coarse thread with Class 2A tolerance for precise fit, and is manufactured to ASTM A574 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
