S-91771A157 6-32 x 1 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable load-bearing performance
• Secure and flush installation thanks to the flat head design with 82° countersink angle, minimizing protrusion in assembled components
• Efficient driving and reduced cam-out with the No. 2 Phillips drive, ensuring quick installation and minimal tool slippage
• Wide compatibility and easy assembly with UNC coarse threading and Class 2A fit, suitable for various materials and applications
• Full-length threading provides consistent grip and holding power along the entire 1-1/2" length
• Regulatory peace of mind with compliance to ASME B18.6.3, RoHS 3, and REACH, ensuring safety and environmental standards are met

Professional Applications & Engineering Value

This 6-32 flat head Phillips screw is engineered to address critical challenges in industrial fastening, such as vibration resistance, material compatibility, and long-term reliability. The passivated 18-8 stainless steel offers excellent resistance to oxidation and chemical exposure, making it suitable for applications in machinery, electronics, and outdoor equipment where moisture or corrosive agents are present. The UNC coarse thread and Class 2A fit ensure quick assembly and secure fastening in metals, plastics, and composite materials, reducing the risk of cross-threading. The flat head with an 82° countersink angle allows for a smooth, flush finish, which is essential in aerodynamic or aesthetic-sensitive designs. Its fully threaded design maximizes contact area, enhancing pull-out strength in dynamic load conditions. These features make it a dependable choice for OEMs and maintenance teams seeking durable, compliant fasteners for demanding environments.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 2A thread fit for consistent engagement and UNC coarse thread specifications. It meets ASME B18.6.3 for mechanical and dimensional integrity, ensuring reliability in industrial applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for various markets. Additional details include a right-hand thread direction, standard flat head profile, and full compliance with stated hardness and tensile strength metrics.