S-92949A623 3/8"-16 x 7/8" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• Exceptional mechanical strength with a 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under high stress.
• Precise and secure fastening ensured by the Class 3A thread fit and UNC coarse thread, reducing the risk of cross-threading and loosening.
• Efficient installation and removal with a 7/32" hex drive, providing a positive grip for high-torque applications.
• Full-thread engagement along the 7/8" length for maximum holding power and uniform load distribution.
• Compliant with major standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental safety.
• Low-profile rounded button head design offers a finished appearance and reduces snagging in assembled components.

Professional Applications & Engineering Value

This 18-8 stainless steel rounded head screw is engineered to address common industrial challenges such as vibration-induced loosening and corrosive degradation. The combination of a Class 3A thread fit and UNC coarse thread provides excellent engagement in a variety of materials, from metals to plastics, ensuring stable connections in dynamic environments. The passivated finish enhances the natural corrosion resistance of stainless steel, making it suitable for outdoor equipment, food processing machinery, and marine applications. With a 70,000 psi tensile strength and fully threaded design, it delivers consistent clamping force and is ideal for heavy-duty assemblies where reliability and durability are critical. The hex drive allows for high torque application, speeding up installation in automated or manual production lines.

Specification Summary & Compliance

This fastener meets ASME B18.3 specifications for dimensional accuracy and performance. The threads conform to UNC coarse thread standards with a Class 3A fit for precise tolerance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances. The screw is right-hand threaded, fully threaded, and features a standard rounded button head profile for consistent performance in industrial fastening applications.