S-91771A156 6-32 x 1 3/4" 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
• Optimized drive engagement with No. 2 Phillips drive for secure installation and reduced cam-out risk
• Precision thread fit with Class 2A UNC coarse threads ensuring smooth assembly and vibration resistance
• Flush mounting capability featuring 82° countersink angle and standard flat head profile for seamless surface integration
• Full-threaded design providing maximum grip length and uniform load distribution across the entire fastener
• Regulatory compliance meeting ASME B18.6.3 specifications and environmental standards for global industrial use

Professional Applications & Engineering Value

Engineered for precision assembly in industrial equipment, machinery, and structural frameworks, these flat head Phillips screws deliver critical performance advantages. The passivated 18-8 stainless steel construction provides exceptional resistance to oxidation and chemical exposure, while the UNC coarse threading with Class 2A fit ensures rapid installation and maintains integrity under vibrational stresses. The 82° countersink angle enables flush surface mounting in metal fabrication and electronic enclosures, eliminating protrusions that could interfere with operational components. With full threading along the 1 3/4" length, these fasteners offer superior holding power in thin materials and composite assemblies, making them ideal for automotive, aerospace, and heavy machinery applications where reliability and corrosion resistance are paramount.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with Class 2A thread fit and UNC coarse thread specifications. Complies with ASME B18.6.3 mechanical and dimensional requirements, ensuring interchangeability and performance consistency. Meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) regulations for chemical safety. The Rockwell B80 hardness and 80,000 psi tensile strength guarantee mechanical reliability in demanding industrial environments.