S-90346A110 4-40 x 1/4" ASME B18.3 High-Strength 316 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh chemical and marine environments
• Exceptional mechanical strength delivering 110,000 psi tensile strength for high-stress industrial applications
• Precise Class 3A thread fit ensures reliable engagement and vibration resistance in critical assemblies
• Optimized drive performance with hex socket design providing secure torque transmission and reduced cam-out risk
• Enhanced durability through cold working process achieving Rockwell C25 hardness for extended service life
• Regulatory compliance meeting ASME B18.3 standards and environmental regulations (RoHS 3, REACH) for global supply chain compatibility
• Versatile coarse thread design with 4-40 UNC configuration enabling rapid installation in various materials

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 316 Stainless Steel Socket Head Cap Screws address critical challenges in chemical processing, marine equipment, and food-grade applications where corrosion resistance is paramount. The cold worked fabrication enhances grain structure, providing superior tensile strength (110,000 psi) while maintaining ductility. The Class 3A thread fit with 4-40 UNC coarse threads ensures precise mating with tapped holes, reducing installation torque requirements and preventing cross-threading in production line applications. The hex socket drive design allows for high torque application in confined spaces, making these fasteners ideal for machinery, precision instruments, and structural assemblies requiring reliable, maintenance-free performance.

Specification Summary & Compliance

This Socket Head Cap Screw features precision 4-40 UNC coarse threads with Class 3A fit tolerance for superior thread engagement. Manufacturing complies with ASME B18.3 specifications, ensuring dimensional accuracy and interchangeability. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances above threshold limits. Mechanical properties include Rockwell C25 hardness and 110,000 psi tensile strength achieved through controlled cold working processes.