S-99355A151 8-32 x 1" ASME B18.3 Tamper-Resistant Asymmetrical-Drive Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
• Excellent mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing applications
• Quick and secure installation through coarse UNC threading and Class 2A thread fit ensuring consistent engagement
• Enhanced drive stability with asymmetrical U10 drive style preventing cam-out during high-torque applications
• Optimized head design featuring a rounded button profile that provides a finished appearance while resisting snagging
• Full threading along 1" length delivers maximum grip and adjustment flexibility in assembly operations
• Regulatory compliance assurance meeting ASME B18.3 standards while being RoHS 3 and REACH compliant for global supply chain integration

Professional Applications & Engineering Value

These 18-8 stainless steel rounded head screws deliver exceptional value in industrial settings where corrosion resistance and mechanical reliability are paramount. The 8-32 UNC coarse thread configuration ensures rapid installation in various materials while maintaining vibration resistance, significantly reducing assembly time in high-volume production environments. The fully threaded design combined with Class 2A thread fit provides consistent clamping force distribution, preventing joint loosening in machinery, electrical enclosures, and structural frameworks. The rounded button head profile offers a safety-enhanced solution by eliminating sharp edges in accessible areas while the asymmetrical U10 drive maximizes torque transfer efficiency. These characteristics make these stainless steel fasteners ideal for OEM manufacturing, maintenance operations, and equipment assembly where durability and regulatory compliance are critical requirements.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit tolerance ensuring interchangeability and proper mating with corresponding nuts and threaded holes. The 8-32 UNC coarse thread specification follows established industrial standards while the 1" length provides consistent engagement depth. Compliance is verified with ASME B18.3 manufacturing specifications, RoHS 3 (2015/863/EU) hazardous substance restrictions, and REACH (EC 1907/2006) chemical safety regulations, ensuring these fasteners meet international environmental and safety requirements for industrial distribution and use.