S-90665A156 1/4"-20 x 1/2" ASTM A574 Alloy Steel Low-Profile Socket Head Screws
Alloy Steel Low-Profile 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 140,000 psi provides reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance from zinc plating extends service life in harsh environments, minimizing maintenance and replacement costs.
- Precise Class 3A thread fit ensures secure, vibration-resistant connections for enhanced assembly integrity and safety.
- Low-profile socket head design allows installation in confined spaces while maintaining high torque capability with a 1/8" hex drive.
- Coarse UNC threads enable quick assembly and disassembly, improving efficiency in production and maintenance workflows.
- Full threading along the 1/2" length offers maximum grip and adjustability for versatile mounting solutions.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global industrial use.
Professional Applications & Engineering Value
This zinc-plated alloy steel socket head cap screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, automotive systems, and structural frameworks. Its high tensile strength and Rockwell C39 hardness prevent stripping and deformation under extreme loads, while the Class 3A thread fit and coarse UNC threads ensure tight, reliable fastening that resists loosening from vibrations. The low-profile head and hex drive facilitate easy access in compact designs, reducing installation time. Ideal for applications demanding corrosion resistance and durability, this screw provides long-term performance without compromising on regulatory standards like ASTM A574.
Specification Summary & Compliance
This product features a 1/4"-20 UNC coarse thread with Class 3A precision fit for consistent dimensional accuracy. It adheres to ASTM A574 specifications for alloy steel socket head cap screws, ensuring high manufacturing quality. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it meets environmental and safety requirements for industrial use.
