S-92220A221 5/16"-18 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 ensures reliable performance under high-stress conditions, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide finish extends service life in harsh industrial environments, minimizing maintenance needs.
- Precise Class 3A thread fit provides excellent vibration resistance and secure fastening, ideal for applications requiring tight tolerances.
- Low-profile socket head design allows for installation in confined spaces while maintaining high torque capability with a 5/32" hex drive.
- Fully threaded coarse UNC pattern enables quick assembly and strong holding power across the entire 1/2" length.
- High hardness (Rockwell C39) enhances wear resistance and durability, ensuring long-term performance in demanding applications.
- Compliance with RoHS 3 and REACH ensures environmental safety and meets global regulatory standards for industrial use.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these Black-Oxide Alloy Steel Socket Head Cap Screws address common challenges like space constraints and corrosion. The low-profile socket head and 5/32" hex drive facilitate easy installation in tight areas, while the Class 3A UNC coarse threads provide superior grip and vibration resistance in machinery, automotive, and assembly lines. With a tensile strength of 140,000 psi and Rockwell C39 hardness, they withstand heavy loads and repetitive stress, reducing downtime. The black-oxide surface treatment offers reliable corrosion protection, making them suitable for outdoor or humid environments where durability is critical.
Specification Summary & Compliance
This screw features a 5/16"-18 UNC coarse thread with Class 3A fit for precise dimensional accuracy, ensuring consistent performance. It is manufactured to ASTM A574 specifications, guaranteeing high-quality alloy steel material. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming adherence to environmental and safety standards for industrial fasteners.
