S-91771A180 2-64 x 1/8" 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, ideal for harsh industrial environments
• Precise flush mounting enabled by the undercut flat head profile and 82° countersink angle for seamless surface integration
• Enhanced torque transmission with Phillips No. 1 drive design, reducing cam-out and improving installation efficiency
• Reliable thread engagement through fully threaded UNF fine thread design, ensuring maximum holding power in precision assemblies
• High mechanical strength with 80,000 psi tensile strength, providing dependable performance under demanding loads
• Consistent dimensional accuracy with Class 2A thread fit, guaranteeing proper mating and reducing assembly errors
• Broad regulatory compliance meeting ASME B18.6.3, RoHS 3, and REACH standards for global market acceptance

Professional Applications & Engineering Value

These 2-64 UNF flat head screws deliver exceptional engineering value in precision-driven applications where space constraints and surface finish are critical. The passivated 18-8 stainless steel construction provides excellent corrosion resistance, making them suitable for electronics enclosures, medical devices, and instrumentation panels exposed to moisture or chemicals. The undercut flat head profile with 82° countersink angle ensures flush mounting without protrusion, preventing interference in tight assemblies while maintaining aesthetic appeal. The UNF fine thread configuration offers superior vibration resistance compared to coarse threads, crucial for maintaining integrity in dynamic environments. Combined with Phillips No. 1 drive compatibility, these screws enable efficient installation in automated or manual assembly processes, reducing production time while maintaining 80,000 psi tensile strength reliability.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for precise engagement. Features 2-64 UNF fine threads with right-hand direction and fully threaded design. The passivated 18-8 stainless steel construction meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements for restricted substance control. Standard dimensions include 1/8" length, 0.162" head diameter, and 0.036" head height with 82° countersink angle.