S-91771A259 10-24 x 3 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 environments and long-term reliability
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for demanding applications
• Secure and flush installation thanks to the standard flat head profile and 82° countersink angle for a smooth, professional finish
• Efficient assembly and removal enabled by the Phillips No. 2 drive style, providing good torque transfer and common tool compatibility
• Reliable coarse threading with UNC 10-24 and Class 2A fit ensures easy engagement and vibration resistance in various materials
• Optimized for deep fastening with a 3-1/2" length and partial threading, offering strong grip where full threading isn't required
• Full regulatory compliance meeting ASME B18.6.3, RoHS 3, and REACH, ensuring safety and environmental standards are met

Professional Applications & Engineering Value

This 10-24 x 3-1/2" flat head Phillips machine screw is engineered to solve critical fastening challenges in industrial settings. The passivated 18-8 stainless steel provides excellent resistance to corrosion and oxidation, making it suitable for outdoor, marine, or chemical-exposed applications. Its UNC coarse thread and Class 2A thread fit ensure quick, secure installation in metals, plastics, and wood, reducing assembly time and minimizing cross-threading risks. The flat head with an 82° countersink allows for a flush mount, essential for applications where protruding hardware could cause interference or safety hazards. With a high tensile strength of 80,000 psi, it reliably handles dynamic loads and stress in machinery, automotive assemblies, and structural frameworks, ensuring long-term performance without failure.

Specification Summary & Compliance

This screw features a 10-24 UNC coarse thread with a Class 2A thread fit for standard dimensional accuracy and ease of use. It is manufactured in compliance with ASME B18.6.3 specifications, ensuring consistent quality and interchangeability. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming it meets stringent environmental and safety regulations for hazardous substances.