S-90665A178 5/16"-18 x 1 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
- Superior tensile strength of 140,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Exceptional hardness (Rockwell C39) provides excellent wear resistance and durability for long-term use in demanding environments.
- Zinc-plated alloy steel construction offers enhanced corrosion resistance, extending the screw's service life in various industrial settings.
- Precise Class 3A thread fit delivers secure, vibration-resistant connections, minimizing loosening in critical assemblies.
- Low-profile socket head design allows for installation in tight spaces while providing ample torque transfer with a 5/32" hex drive.
- Coarse UNC threading enables quick and easy installation, reducing assembly time and labor costs.
- Full compliance with ASTM A574, RoHS 3, and REACH ensures material quality, environmental safety, and regulatory adherence for global supply chains.
Professional Applications & Engineering Value
This Socket Head Cap Screw is engineered to address common industrial fastening challenges, such as vibration-induced loosening and corrosion in harsh environments. The zinc-plated alloy steel material provides a protective barrier against moisture and chemicals, making it ideal for machinery, automotive, and construction applications. The low-profile head and 5/32" hex drive facilitate access in confined spaces, while the coarse UNC thread ensures rapid assembly without compromising grip strength. With a Class 3A thread fit, it maintains tight tolerances for secure connections in high-vibration settings, reducing maintenance needs and enhancing operational reliability. This screw is a dependable choice for engineers seeking durable, compliant fasteners that meet rigorous ASTM A574 standards.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC thread with Class 3A fit for precise dimensional accuracy and coarse thread spacing. It is manufactured in accordance with ASTM A574 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
