S-91771A150 6-32 x 5/8" 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 environments
• Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B80 hardness for demanding industrial applications
• Precision thread engagement through Class 2A UNC coarse threading, providing secure fastening and vibration resistance
• Optimized flush mounting with standard 82° countersink angle and flat head design for seamless surface integration
• Efficient installation with Phillips No. 2 drive system, enabling quick assembly with standard tools
• Full thread coverage across the entire 5/8" length, maximizing grip strength and load distribution
• Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for quality and safety

Professional Applications & Engineering Value

These flat head Phillips machine screws deliver critical performance advantages in industrial settings where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against oxidation and chemical exposure, making them ideal for marine equipment, food processing machinery, and outdoor industrial applications. The combination of UNC coarse threading with Class 2A fit ensures rapid assembly while maintaining precise tolerance control, reducing installation time without compromising joint security. The 82° countersink angle and flat head profile create clean, flush surfaces that prevent snagging and improve aesthetic integration in precision assemblies. These fully threaded screws distribute clamping force evenly across the entire fastener length, enhancing connection stability in vibration-prone environments.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent performance. Features UNC coarse thread spacing (6-32 size) with right-hand threading direction and standard flat head profile. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. The passivated surface treatment on 18-8 stainless steel provides enhanced corrosion protection while maintaining the material's inherent strength characteristics.