S-91099A255 8-32 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 thread fit and UNC coarse threading, ensuring secure fastening and vibration resistance
• Flush mounting capability with undercut flat head design and 82° countersink angle for seamless surface integration
• Efficient installation using standard No. 2 Phillips drive, reducing assembly time and tool wear
• Full-length threading providing maximum grip and uniform stress distribution along the entire 5/16" length
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards (RoHS 3, REACH)

Professional Applications & Engineering Value

These 8-32 UNC flat head Phillips machine screws deliver critical performance advantages in demanding industrial applications where corrosion resistance and structural integrity are paramount. The passivated 18-8 stainless steel construction provides exceptional protection against chemical exposure and atmospheric corrosion, making them ideal for manufacturing equipment, electronic enclosures, and marine components. The undercut flat head profile with 82° countersink angle ensures flush mounting without protrusion, preventing snagging while maintaining aerodynamic surfaces. With coarse UNC threading and Class 2A thread fit, these screws offer rapid assembly and reliable thread engagement in various materials, reducing installation time while maintaining vibration resistance in dynamic operating environments. The combination of 80,000 PSI tensile strength and full threading provides uniform clamping force distribution, essential for applications requiring consistent pressure across joined components.

Specification Summary & Compliance

This 5/16" length flat head screw features precision 8-32 UNC coarse threads with Class 2A thread fit tolerance for consistent engagement. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) requirements for chemical safety, ensuring environmental regulatory adherence for industrial applications.