S-90128A250 1/4"-20 x 1 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.
- Superior corrosion resistance from zinc plating protects against rust and extends service life in harsh industrial environments.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant connections in machinery and equipment.
- Fully threaded design offers consistent holding power along the entire length, ideal for adjustable or deep-set fastening needs.
- Hex socket drive allows for high-torque installation with standard tools, minimizing stripping and improving assembly efficiency.
- Compliance with ASTM A574 guarantees material quality and manufacturing consistency for dependable use in critical applications.
- Rockwell C37 hardness ensures excellent wear resistance and durability under repeated load cycles.
Professional Applications & Engineering Value
This zinc-plated alloy steel socket head cap screw is engineered to address common industrial challenges such as vibration loosening and environmental degradation. The UNC coarse thread and Class 3A fit provide superior grip in materials like steel and aluminum, reducing the need for frequent maintenance in heavy machinery, automotive assemblies, and construction equipment. The fully threaded rod type allows for versatile positioning and clamping force distribution, while the hex drive facilitates easy installation in confined spaces. Ideal for applications demanding high tensile strength and corrosion resistance, this fastener ensures long-term reliability in demanding environments, from manufacturing plants to outdoor infrastructure.
Specification Summary & Compliance
This socket head cap screw features a 1/4"-20 UNC coarse thread with Class 3A thread fit for precision alignment. Manufactured to ASTM A574 specifications, it ensures consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and use in global markets.
