S-91274A352 3/8"-16 x 4" 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 industrial applications, reducing the risk of fastener failure.
- Zinc-flake coating on alloy steel provides superior corrosion resistance, extending service life in harsh environments and minimizing maintenance needs.
- Class 3A thread fit offers precise, tight tolerances for secure fastening and vibration resistance, ideal for critical assemblies.
- Partially threaded design with 1 1/4" minimum thread length allows for optimal grip and alignment in varied material thicknesses, enhancing installation efficiency.
- Hex socket drive (5/16") enables easy installation with standard tools, reducing assembly time and improving workplace safety.
- Compliance with ASME B18.3 and ASTM A574 standards guarantees consistent quality and interoperability, supporting engineering specifications.
- RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence, making it suitable for global supply chains.
Professional Applications & Engineering Value
This 3/8"-16 UNC Socket Head Cap Screw is engineered from zinc-flake-coated alloy steel to address common industrial challenges such as corrosion and mechanical stress. The coarse thread spacing and Class 3A thread fit provide excellent holding power in dynamic environments, preventing loosening under vibration. With a Rockwell C37 hardness and 170,000 PSI tensile strength, it withstands heavy loads in machinery, automotive, and construction applications. The partially threaded design ensures precise clamping without compromising structural integrity, while the hex drive allows for quick, tool-friendly installation. Ideal for high-strength fastening in corrosive settings, this screw delivers long-term reliability and reduces downtime.
Specification Summary & Compliance
This screw features precise Class 3A thread fit per UNC standards, with a thread size of 3/8"-16 and minimum thread length of 1 1/4". It adheres to ASME B18.3 and ASTM A574 manufacturing specifications, ensuring dimensional accuracy and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), it meets environmental and safety regulations for industrial use.
