S-91274A340 3/8"-16 x 3" 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.
- Superior corrosion resistance from zinc-flake coating protects against harsh environments, extending service life and reducing maintenance needs.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies in demanding machinery.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated installations.
- 5/16" hex drive design allows for easy installation with standard tools, speeding up assembly while minimizing stripping risks.
- Partially threaded shank enables optimal clamping force distribution, ideal for components requiring precise joint security.
- Compliance with ASME B18.3 and ASTM A574 guarantees consistent quality and interoperability in professional engineering projects.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this 3/8"-16 UNC Socket Head Cap Screw addresses critical challenges in machinery assembly, automotive systems, and structural frameworks. The zinc-flake-coated alloy steel construction combats corrosion in humid or chemically aggressive settings, while the coarse UNC thread ensures rapid, secure fastening even in high-vibration environments. With a partially threaded design, it provides concentrated clamping force, preventing joint loosening in dynamic loads. Ideal for high-strength fastening where reliability and compliance with ASME B18.3 standards are non-negotiable, this screw minimizes downtime and enhances operational safety.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit for precise dimensional accuracy under UNC standards, with a 3/8"-16 coarse thread and 3" length. Manufactured in accordance with ASME B18.3 and ASTM A574 specifications, it ensures consistent performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for global industrial use.
