S-92196A640 3/8"-16 x 4" ASME B18.3 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Exceptional tensile strength of 70,000 psi ensures high load-bearing capacity and prevents fastener failure under stress.
• Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies and reduced risk of loosening.
• Efficient torque transmission via the 5/16" hex drive and standard socket head profile, allowing for easy installation in confined spaces.
• Durable Rockwell B70 hardness offers excellent wear resistance and maintains thread integrity through repeated use.
• Reliable coarse UNC threading (3/8"-16) enables quicker assembly and better performance in materials prone to stripping.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety, quality, and environmental responsibility.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this Socket Head Cap Screw delivers critical performance where high strength and corrosion resistance are paramount. The 18-8 Stainless Steel material combats rust and chemical exposure, making it suitable for machinery, automotive, and marine environments. Its 3/8"-16 UNC coarse thread with a Class 3A fit ensures precise engagement, reducing the risk of cross-threading and providing reliable clamping force in dynamic load conditions. The partially threaded design and 4" length allow for optimal grip range, while the hex drive facilitates secure tightening even in limited-access areas. This combination addresses common assembly challenges like vibration loosening and material fatigue, enhancing operational safety and reducing maintenance needs.

Specification Summary & Compliance

This screw adheres to strict dimensional and performance criteria, including a Class 3A thread fit for high precision and UNC coarse threading per standard inch system requirements. It meets ASME B18.3 specifications for socket head cap screws, ensuring consistent quality and interchangeability. Additionally, the product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries without hazardous substances.