S-91781A203 8-32 x 1 1/2" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Exceptional mechanical strength delivering 80,000 psi tensile strength and Rockwell B80 hardness for reliable performance under high stress
• Precision thread engagement with Class 2A fit and UNC coarse threads ensuring secure fastening and easy installation
• Optimized flush mounting featuring standard flat head profile with 82° countersink angle for seamless surface integration
• Full threading capability providing maximum grip length and uniform load distribution across the entire 1½" shaft
• Comprehensive compliance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
• Versatile drive compatibility with slotted head design accommodating standard screwdrivers for convenient maintenance

Professional Applications & Engineering Value

These 8-32 UNC flat head slotted screws deliver critical engineering advantages in industrial applications where corrosion resistance and mechanical integrity are paramount. The 18-8 stainless steel composition, enhanced by passivated surface treatment, provides exceptional protection against chemical exposure and atmospheric corrosion, making them ideal for marine equipment, food processing machinery, and outdoor installations. The fully threaded design ensures maximum thread engagement in tapped holes, while the coarse thread spacing facilitates quick assembly and disassembly in maintenance-intensive environments. The 82° countersink angle allows for flush mounting in precision applications where surface protrusion is unacceptable, providing both aesthetic appeal and functional safety in automated systems and enclosure assemblies.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with Class 2A thread fit tolerance and UNC thread form specifications. These fasteners comply with ASME B18.6.3 mechanical and dimensional requirements, ensuring interchangeability and reliability in industrial applications. Environmental compliance includes RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) chemical safety standards, making them suitable for regulated industries and international markets.