S-91771A256 10-24 x 2 1/2" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh environments.
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for dependable performance under high stress.
• Precise and secure fastening achieved with Class 2A thread fit and UNC coarse threading, reducing cross-threading risks.
• Optimized flush installation with a standard 82° countersink angle and flat head design for a smooth, professional finish.
• Easy and efficient installation using a standard No. 2 Phillips drive, compatible with common industrial tools.
• Reliable partial threading providing controlled grip length for applications requiring specific unthreaded shank sections.
• Full regulatory compliance meeting ASME B18.6.3, RoHS 3, and REACH standards for safe, quality-assured use.

Professional Applications & Engineering Value

These 10-24 UNC flat head screws are engineered to address critical industrial fastening challenges where corrosion resistance, strength, and precision are paramount. The passivated 18-8 stainless steel material provides excellent protection against rust and chemical exposure, making these screws ideal for outdoor equipment, marine hardware, and chemical processing applications. The partially threaded design with coarse UNC threads ensures rapid assembly and secure holding power in materials like metal and hard plastics, while the 82° countersink angle allows for a flush mount that prevents snagging and maintains aerodynamic or aesthetic surfaces. With a high 80,000 psi tensile strength, they deliver reliable performance in heavy-duty industrial and mechanical assemblies, reducing the risk of fastener failure and maintenance downtime.

Specification Summary & Compliance

This product adheres to precise dimensional standards, including a Class 2A thread fit for consistent assembly and UNC coarse threading (10-24 size) with a minimum thread length of 1-1/2". Manufacturing and quality are governed by ASME B18.6.3 specifications, ensuring interchangeability and reliability. Additionally, the screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming they are free from hazardous substances and safe for various industrial and commercial uses.