S-91771A844 10-32 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, ensuring long-term reliability in harsh environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for heavy-duty applications
• Precise flush mounting enabled by the 82° countersink angle and standard flat head profile for seamless surface integration
• Secure fastening performance through Class 2A thread fit and UNF fine threading, minimizing vibration loosening
• Optimized installation efficiency with Phillips No. 2 drive design, providing reliable torque transfer during assembly
• Versatile partial threading allowing precise clamping control across the 3 1/2" length for various material thicknesses
• Full regulatory compliance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 10-32 UNF flat head screws deliver critical performance advantages where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against chemical exposure and atmospheric corrosion, making these flat head screws ideal for marine equipment, food processing machinery, and outdoor structural applications. The combination of UNF fine threading with Class 2A thread fit ensures vibration-resistant connections in precision assemblies, while the partially threaded design allows for optimal clamping force distribution. The 82° countersink angle facilitates perfect flush mounting in machined components, eliminating protrusions that could interfere with mechanical operation or safety.

Specification Summary & Compliance

These inch-system fasteners maintain Class 2A thread fit tolerances per UNF standards with 10-32 thread size and 3 1/2" length. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, ensuring restricted substance adherence for global industrial applications.