S-92949A868 3/8"-16 x 1 3/8" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction and passivated finish, ideal for harsh environments
• Exceptional tensile strength rated at 70,000 psi for reliable, heavy-duty load-bearing applications
• Precise Class 3A thread fit ensures secure engagement and reduces the risk of cross-threading during installation
• Fully threaded design provides consistent clamping force along the entire 1-3/8" length for uniform stress distribution
• Hex socket drive (7/32") allows for high-torque installation with standard tools, minimizing stripping risks
• Rounded button head profile offers a low-profile, finished appearance while reducing snagging hazards
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees material safety and meets rigorous industrial standards

Professional Applications & Engineering Value

This 3/8"-16 UNC Rounded Head Socket Cap Screw is engineered to address critical challenges in industrial assembly, where corrosion resistance, mechanical strength, and installation reliability are paramount. The 18-8 Stainless Steel material, enhanced by a passivated finish, provides long-term durability in moist or chemically aggressive settings, reducing maintenance costs and downtime. The coarse UNC thread and Class 3A fit ensure rapid, secure fastening in high-vibration applications such as machinery, automotive components, and structural frameworks. Its fully threaded body and hex drive design enable consistent torque application, making it a preferred choice for OEMs and MRO professionals seeking to optimize assembly efficiency and product lifecycle.

Specification Summary & Compliance

This fastener adheres to Class 3A thread tolerances per the Unified National Coarse (UNC) system, with a thread size of 3/8"-16. It is manufactured in compliance with ASME B18.3 specifications, ensuring dimensional accuracy and mechanical performance. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances. With a tensile strength of 70,000 psi and Rockwell B55 hardness, it meets the demands of rigorous industrial applications while maintaining environmental and safety standards.