S-91771A925 0-80 x 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 for extended service life in harsh environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for reliable performance under load
• Precision thread engagement with Class 2A fit and UNF fine threads ensuring secure fastening in critical applications
• Optimized flush mounting with standard 100° countersink angle and flat head design for smooth surface finishes
• Enhanced drive stability with Phillips No. 0 drive style providing secure torque transmission during installation
• Full threading coverage along the 1/2" length for maximum grip and load distribution
• Regulatory compliance assurance meeting ASME B18.6.3 specifications while being RoHS 3 and REACH compliant

Professional Applications & Engineering Value

These 0-80 UNF flat head Phillips machine screws deliver critical engineering advantages for precision assembly applications. The passivated 18-8 stainless steel construction provides exceptional resistance to corrosion and chemical exposure, making them ideal for electronics, aerospace components, and medical devices where environmental durability is paramount. The fine UNF threads with Class 2A fit ensure precise engagement in thin materials and delicate components, preventing stripping while maintaining consistent clamping force. The 100° countersink angle and flat head profile enable seamless flush mounting in precision machinery and instrumentation, eliminating protrusions that could interfere with moving parts or aesthetic requirements. With 80,000 psi tensile strength, these screws maintain structural integrity in high-vibration environments, solving common failure points in industrial equipment and precision manufacturing applications.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards, these flat head screws feature precision Class 2A thread fit with UNF 0-80 fine threading and right-hand orientation. The 1/2" length is fully threaded for maximum engagement, while the standard flat head profile with 100° countersink angle ensures proper seating. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations guarantees environmental safety and material transparency, making them suitable for global industrial applications requiring strict regulatory adherence.