S-90665A158 1/4"-20 x 3/4" 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 ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Zinc-plated alloy steel construction provides excellent corrosion resistance, extending service life in demanding industrial environments.
- Class 3A thread fit offers superior precision and tighter tolerances for secure, vibration-resistant assemblies.
- Low-profile socket head design allows for easy installation in confined spaces with standard hex tools.
- Fully threaded body ensures maximum grip and holding power along the entire length for versatile applications.
- Rockwell C39 hardness delivers enhanced durability and wear resistance, maintaining integrity through repeated use.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees adherence to strict quality and environmental standards for global use.
Professional Applications & Engineering Value
This 1/4"-20 UNC socket head cap screw is engineered to address common industrial challenges such as vibration loosening and corrosion in machinery assembly. The zinc-plated alloy steel material provides a robust barrier against rust, ideal for automotive, aerospace, and heavy equipment applications where exposure to harsh conditions is frequent. Its coarse thread and Class 3A fit ensure quick, secure fastening with minimal risk of cross-threading, while the low-profile head design facilitates access in tight spaces. By combining high tensile strength and precise thread standards, this fastener enhances structural integrity, reduces maintenance downtime, and supports efficient production lines.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 3A fit for precise dimensional accuracy, adhering to ASTM A574 specifications for high-strength alloy steel fasteners. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for industrial use worldwide.
