S-91771A058 0-80 x 7/16" 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 ensures secure, vibration-resistant fastening
• Optimized flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
• Efficient installation using Phillips No. 0 drive system for quick assembly with standard tools
• Full-threaded design provides maximum grip length and uniform stress distribution across the entire fastener
• Regulatory compliance assurance meeting ASME B18.6.3 specifications for dimensional accuracy and performance standards

Professional Applications & Engineering Value

These 0-80 UNF flat head screws deliver critical performance advantages in precision engineering applications where space constraints and material compatibility are paramount. The passivated 18-8 stainless steel construction provides excellent resistance to oxidation and chemical exposure, making these Phillips drive screws ideal for electronics enclosures, instrumentation panels, and medical devices requiring repeated sterilization. The fine thread configuration offers superior vibration resistance compared to coarse threads, while the 82° countersink angle ensures flush mounting in precision-machined components. With full threading along the entire 7/16" length, these industrial fasteners maximize thread engagement in thin materials and blind holes, preventing loosening under dynamic loads.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards with Class 2A thread fit tolerances for consistent dimensional accuracy. The UNF 0-80 fine threads provide precise engagement in applications requiring fine adjustment capabilities. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and material safety. Right-hand thread direction with standard flat head profile and Phillips No. 0 drive size for compatibility with common installation tools.