S-91274A316 3/8"-16 x 1 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 in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the zinc-flake coating provides long-lasting durability, even in harsh industrial environments.
- Precise Class 3A thread fit guarantees secure, vibration-resistant connections, minimizing loosening over time.
- High hardness rating (Rockwell C37) offers excellent wear resistance, extending the screw's service life.
- Fully threaded design allows for maximum grip and adjustability across the entire length, enhancing assembly versatility.
- Standard hex socket drive (5/16") enables easy installation with common tools, speeding up assembly processes.
- Compliance with ASME B18.3 and ASTM A574 ensures consistent quality and interchangeability, supporting standardized engineering requirements.
Professional Applications & Engineering Value
This 3/8"-16 UNC Socket Head Cap Screw is engineered to address critical challenges in industrial settings, such as vibration-induced loosening and environmental corrosion. Constructed from zinc-flake-coated alloy steel, it provides a robust barrier against moisture and chemicals, making it ideal for machinery, automotive assemblies, and heavy equipment. The coarse UNC thread and Class 3A fit deliver superior clamping force and thread engagement, reducing maintenance needs in dynamic applications. Its fully threaded, right-hand design ensures uniform stress distribution, while the hex drive facilitates quick installation in confined spaces, boosting productivity on the assembly line.
Specification Summary & Compliance
This screw adheres to precise dimensional standards, including a Class 3A thread fit and UNC coarse thread specifications per ASME B18.3. It meets manufacturing guidelines under ASTM A574 for material consistency and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
