S-91771A206 8-32 x 2 1/4" 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
• High tensile strength of 80,000 psi provides exceptional load-bearing capacity for demanding industrial applications
• Precision Class 2A thread fit ensures smooth installation and secure fastening with minimal cross-threading risk
• 82° countersink angle allows for flush mounting in standard applications, creating clean, professional finishes
• Partially threaded design offers optimal grip strength while preventing material distortion in thin-section assemblies
• Phillips drive with No. 2 size enables efficient installation with common tools while resisting cam-out during torque application
• Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH standards guarantees quality and environmental responsibility

Professional Applications & Engineering Value

This 8-32 UNC flat head screw delivers exceptional engineering value across multiple industrial sectors. The passivated 18-8 stainless steel construction provides outstanding corrosion resistance, making it ideal for applications in marine environments, food processing equipment, and outdoor machinery where moisture and chemical exposure are concerns. The partially threaded design combined with Class 2A thread fit ensures precise engagement in materials ranging from metals to plastics, preventing stripping while maintaining consistent clamping force. The 82° countersink angle and flat head profile create seamless surface finishes in countersunk holes, essential for applications requiring aerodynamic surfaces or where protruding fasteners would interfere with mechanical operation. These industrial screws are particularly valuable in assembly lines where consistent performance and reliability are critical to manufacturing efficiency.

Specification Summary & Compliance

This fastener maintains precise dimensional accuracy with Class 2A thread fit per UNC standards and features a 2-1/4" length with 1-1/2" minimum thread length. Manufacturing complies with ASME B18.6.3 specifications for dimensional consistency and performance reliability. The screw meets stringent environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, ensuring safe use across various industries. Material properties include Rockwell B80 hardness and 80,000 psi tensile strength, providing mechanical integrity for critical fastening applications.