S-91771A101 3-48 x 1" 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 tensile strength rated at 80,000 psi for reliable performance in demanding applications
• Precision thread engagement with Class 2A fit and UNC coarse threads ensuring secure fastening
• Optimized flush mounting with standard 82° countersink angle for seamless surface integration
• Enhanced durability backed by Rockwell B80 hardness for long-term mechanical integrity
• Full-threaded design maximizes grip length and holding power across the entire fastener
• Regulatory compliance meets ASME B18.6.3 specifications and environmental standards

Professional Applications & Engineering Value

These 3-48 UNC flat head Phillips screws deliver critical engineering solutions where surface flushness and corrosion resistance are paramount. The passivated 18-8 stainless steel construction provides excellent protection against oxidation and chemical exposure, making them ideal for marine, food processing, and outdoor equipment applications. The fully threaded design ensures maximum thread engagement in thin materials, while the standard 82° countersink angle guarantees proper seating in precision-machined components. With coarse thread spacing and Class 2A thread fit, these fasteners offer quick assembly and reliable performance in vibration-prone environments, reducing maintenance cycles and improving operational efficiency.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards with Class 2A thread fit tolerance for consistent performance. Features UNC coarse threads with right-hand thread direction and fully threaded configuration. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.