S-91771A161 6-32 x 2 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
• Optimized drive engagement through Phillips No. 2 drive design, ensuring efficient installation and reduced cam-out risk
• Precision countersinking capability with 82° flat head profile for seamless flush mounting in various applications
• Enhanced thread reliability with UNC coarse threading and Class 2A fit, providing secure fastening in diverse materials
• Versatile partial threading allowing unthreaded shank section for precise clamping control in assembly operations
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 6-32 UNC flat head screws deliver critical engineering solutions where corrosion resistance and structural integrity are paramount. The Passivated 18-8 Stainless Steel construction provides exceptional protection against oxidation and chemical exposure, making these Phillips drive screws ideal for manufacturing equipment, electrical enclosures, and outdoor infrastructure. The partially threaded design enables precise joint compression control, while the 82° countersink angle ensures flush mounting in precision-machined components. With coarse UNC threading and 2 1/2" length, these industrial fasteners offer superior pull-out resistance in softer materials and accelerated installation in high-volume production environments.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent engagement. The inch-system fasteners feature UNC coarse threads with minimum 1 1/2" thread length and standardized flat head profile. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures global acceptability for industrial applications requiring stringent material restrictions.