S-91771A168 1-72 x 3/8" 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 industrial environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for demanding applications
• Precision thread engagement through Class 2A thread fit and UNF fine threads, providing secure fastening with reduced vibration loosening
• Optimized flush mounting with standard 82° countersink angle and flat head design for smooth surface finishing
• Enhanced drive stability with Phillips No. 0 drive style, preventing cam-out during installation
• Full threading coverage across the 3/8" length for maximum grip strength and load distribution
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

These 1-72 UNF flat head screws deliver critical performance advantages for precision assembly applications where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against chemical exposure and environmental degradation, while the UNF fine thread configuration ensures superior vibration resistance in dynamic load conditions. The 82° countersink angle and flat head profile enable seamless integration into precision machinery, electronic enclosures, and aerospace components where flush surface requirements are critical. With Phillips No. 0 drive compatibility, these screws offer efficient installation in confined spaces while maintaining 80000 psi tensile strength for high-stress industrial fastening applications.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards with Class 2A thread fit tolerance for precision engagement. Features 1-72 UNF fine threads with right-hand orientation and full threading along the 3/8" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The passivated surface treatment on 18-8 stainless steel provides enhanced corrosion protection while maintaining the material's inherent strength characteristics.