S-91772A839 10-32 x 2 1/4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from passivated 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments
• Optimized load distribution with the rounded pan head design, reducing surface damage and providing secure fastening
• Enhanced driving efficiency through the Phillips No. 2 drive style, minimizing cam-out and speeding up installation
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness, preventing stripping and deformation under stress
• Precision thread engagement with Class 2A fit and UNF fine threading, delivering vibration resistance and consistent clamping force
• Versatile partial threading allowing unthreaded shank sections for precise alignment and shear strength in assembled components
• Full regulatory compliance meeting ASME B18.6.3 specifications while being RoHS 3 and REACH compliant for global supply chain integration

Professional Applications & Engineering Value

These 10-32 UNF partially threaded screws deliver critical engineering solutions where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction provides inherent protection against oxidation and chemical exposure, making them ideal for industrial equipment, marine components, and outdoor machinery. The partially threaded design ensures optimal stress distribution by allowing the unthreaded shank to bear shear loads while the fine UNF threading maintains tension in vibration-prone assemblies. With their pan head profile and Phillips No. 2 drive, these fasteners enable rapid installation in confined spaces while preventing surface marring. This combination of material properties and thread engineering addresses common failure points in high-stress applications, providing maintenance-free service life and reduced total cost of ownership.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread fit ensuring consistent dimensional accuracy across production batches. The UNF 10-32 thread form maintains precise fine thread spacing for superior engagement in tapped holes. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and unrestricted international distribution. The 2 1/4" length with 1 1/2" minimum thread length provides standardized dimensional consistency for engineering drawings and automated assembly processes.