S-91274A368 3/8"-16 x 6" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-flake coating, ideal for harsh industrial environments and extending service life.
• High tensile strength of 170,000 psi ensures reliable performance in heavy-duty and high-stress applications.
• Precise Class 3A thread fit guarantees secure, vibration-resistant fastening with minimal risk of loosening.
• Rockwell C37 hardness provides excellent wear resistance and durability under repeated use.
• 5/16" hex drive and standard socket head allow for easy installation and high torque application with standard tools.
• Partially threaded 6" length offers versatility for applications requiring both clamped and unthreaded sections.
• Compliance with major industry standards including ASME B18.3 and ASTM A574 ensures consistent quality and reliability.

Professional Applications & Engineering Value

This 3/8"-16 UNC Socket Head Cap Screw is engineered to solve critical fastening challenges in demanding industrial settings. The zinc-flake-coated alloy steel construction provides superior protection against corrosion, making it ideal for machinery, automotive assemblies, and outdoor equipment exposed to moisture and chemicals. The coarse thread spacing and Class 3A thread fit ensure quick assembly and a secure hold, reducing the risk of thread stripping and vibration-induced failures. With a high tensile strength of 170,000 psi and Rockwell C37 hardness, it withstands extreme loads and repetitive stress, offering long-term reliability in heavy-duty applications like construction equipment, manufacturing jigs, and aerospace components where precision and durability are paramount.

Specification Summary & Compliance

This socket head cap screw features a 3/8"-16 UNC thread with Class 3A precision fit and coarse thread spacing for optimal engagement. It is manufactured in accordance with ASME B18.3 and ASTM A574 specifications, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial and consumer applications without hazardous substances.