S-90128A133 1/4"-20 x 1 1/8" 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 under high-stress conditions, reducing the risk of fastener failure in demanding applications.
- Zinc-plated alloy steel construction provides superior corrosion resistance, extending service life and maintaining integrity in harsh industrial environments.
- Class 3A thread fit offers precise, tight-tolerance engagement for secure fastening and vibration resistance, minimizing loosening over time.
- Partially threaded design allows for controlled clamping force and easier alignment in assemblies, improving installation efficiency.
- Hex socket drive (3/16") enables high-torque application with standard tools, ensuring firm installation and reducing strip-out risks.
- Coarse UNC threads facilitate quick assembly and disassembly, saving time in maintenance and production cycles.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency, environmental safety, and adherence to international quality standards.
Professional Applications & Engineering Value
Engineered for industrial fastening solutions, this 1/4"-20 UNC Socket Head Cap Screw addresses critical needs in machinery, automotive, and structural assemblies where vibration and load stresses are prevalent. The zinc-plated alloy steel material combats corrosion, while the Rockwell C37 hardness ensures durability against wear. Its partially threaded and coarse thread design simplifies alignment and enhances grip in coarse-grained materials, reducing installation errors. Ideal for high-strength applications, it provides a reliable, long-lasting connection that minimizes maintenance downtime and supports operational efficiency in B2B procurement contexts.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit for precision and UNC coarse thread standards in the inch system, with a thread size of 1/4"-20 and minimum thread length of 1 inch. It meets ASTM A574 specifications for material and manufacturing, ensuring consistent quality. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmental and safety standards for global industrial use.
