S-90128A569 1/4"-20 x 4 1/2" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional tensile strength of 170,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance with zinc-plated alloy steel construction, extending service life in harsh environments and minimizing maintenance needs.
- Precise Class 3A thread fit provides secure, vibration-resistant fastening with minimal play, ideal for machinery and equipment assembly.
- Coarse UNC 1/4"-20 threads enable quick installation and removal, saving time in maintenance and production cycles.
- Hex socket drive design allows for high-torque application with standard 3/16" hex keys, preventing stripping and ensuring tight fastening in confined spaces.
- Partially threaded shank offers optimal grip and clamping force control, perfect for applications requiring precise load distribution.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety, meeting global industrial standards.
Professional Applications & Engineering Value
Engineered for demanding industrial environments, this Socket Head Cap Screw combines zinc-plated alloy steel with a Rockwell C37 hardness to resist wear and deformation under heavy loads. The UNC coarse thread and Class 3A fit ensure rapid, secure fastening in metal fabrication, automotive assemblies, and machinery, where vibration loosening is a common issue. Its partially threaded design and high tensile strength provide reliable clamping in structural applications, reducing downtime and enhancing operational safety. Ideal for OEM and MRO uses, this fastener delivers consistent performance in corrosive or high-stress settings, supported by full regulatory compliance.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 3A fit for precise dimensional accuracy, a minimum thread length of 1", and a partially threaded rod. It meets ASTM A574 specifications for high-strength socket head cap screws, ensuring consistent manufacturing quality. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, it is free of hazardous substances, making it suitable for global industrial and commercial applications.
