S-91274A348 3/8"-16 x 3 1/2" ASME B18.3, ASTM A574, ASTM B117 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.
- Superior corrosion resistance provided by the zinc-flake coating, extending service life in harsh industrial environments.
- Precise Class 3A thread fit offers excellent engagement and vibration resistance, maintaining joint integrity.
- High hardness (Rockwell C37) enhances wear resistance and durability, suitable for repetitive assembly and disassembly.
- 5/16" hex drive design allows for easy installation and high torque application with standard tools, improving assembly efficiency.
- Partially threaded shank provides optimal clamping force and prevents thread damage in precise applications.
- Compliance with ASME B18.3 and ASTM A574 guarantees consistent quality and interoperability in professional settings.
Professional Applications & Engineering Value
This zinc-flake-coated alloy steel socket head cap screw is engineered to address critical challenges in industrial fastening, such as corrosion, high tensile loads, and vibration loosening. The UNC coarse threads and Class 3A thread fit ensure quick assembly and secure fastening in machinery, automotive, and heavy equipment applications. The high tensile strength and robust socket head design allow for reliable performance in confined spaces, reducing maintenance downtime and enhancing operational safety. Ideal for use in industrial fasteners requiring durability and compliance with stringent standards, this screw delivers consistent value in demanding engineering environments.
Specification Summary & Compliance
This product adheres to precise dimensional standards, including Class 3A thread fit and UNC coarse thread specifications. It meets ASME B18.3 and ASTM A574 manufacturing norms, ensuring high-quality production. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmental and safety requirements for global industrial use.
