S-91771A962 10-32 x 5/16" 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
• Precision thread engagement through Class 2A fit and UNF fine threading, ensuring secure fastening and vibration resistance
• Optimized flush mounting with standard 100° countersink angle and flat head design for seamless surface integration
• Efficient installation using Phillips No. 2 drive, providing common tool compatibility and reduced assembly time
• Full-threaded design maximizing grip length and distribution of clamping force across the entire fastener
• Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for global industrial applications

Professional Applications & Engineering Value

These 10-32 UNF flat head screws deliver critical performance in demanding environments where material integrity and precise fit are paramount. The passivated 18-8 stainless steel provides excellent resistance to oxidation and chemical exposure, preventing failure in moisture-rich or corrosive settings. The UNF fine thread and Class 2A fit ensure minimal backlash and superior vibration resistance, making them ideal for precision assemblies in machinery, electronics, and automotive components. The 100° countersink angle and flat head profile allow for flush mounting in countersunk holes, eliminating protrusions that could interfere with moving parts or aesthetic requirements. With full threading along the 5/16" length, these screws offer uniform stress distribution, reducing the risk of loosening under dynamic loads and extending service life in industrial applications.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit tolerances per UNF standards, ensuring consistent engagement and interchangeability. Manufacturing and dimensional compliance adhere to ASME B18.6.3 specifications, guaranteeing precise head diameter (0.362"), head height (0.083"), and thread geometry. The product is verified as RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming the absence of restricted hazardous substances and supporting use in regulated markets.