S-90128A557 1/4"-20 x 3 1/4" 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 of 170,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Zinc-plated alloy steel construction provides superior corrosion resistance, extending service life in harsh industrial environments.
- Class 3A thread fit offers precise, tight tolerances for secure fastening and vibration resistance in machinery assemblies.
- Partially threaded design allows for controlled clamping force and easier alignment in components requiring specific grip lengths.
- Hex socket drive enables high-torque installation with standard tools, minimizing stripping and improving assembly efficiency.
- Rockwell C37 hardness ensures durability and wear resistance, maintaining integrity under repeated use.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees quality, safety, and environmental standards for global industrial 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 demanding settings. Made from zinc-plated alloy steel, it combines high tensile strength with a coarse thread and Class 3A fit to provide secure, long-lasting fastening in machinery, automotive, and construction applications. The partially threaded rod design allows for precise load distribution, reducing stress concentrations and enhancing joint reliability. Ideal for industrial fasteners requiring robust performance, this screw's hex drive facilitates quick installation with standard tools, streamlining assembly processes while meeting strict ASTM A574 specifications for consistent quality.
Specification Summary & Compliance
This socket head cap screw adheres to precise dimensional standards, including a Class 3A thread fit and UNC coarse thread with a right-hand direction for consistent engagement. Manufactured in accordance with ASTM A574, it ensures high strength and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental suitability for various industrial uses.
