S-90585A024 2-56 x 1/4" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction and passivated finish, ideal for harsh industrial environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing performance
• Precision thread engagement with Class 3A fit and UNC coarse threads ensuring secure fastening and vibration resistance
• Optimized flush mounting featuring standard 82° countersink angle and flat head design for seamless surface integration
• Enhanced torque transmission through hex drive (0.050") design preventing cam-out during installation
• Full threading coverage across 1/4" length providing maximum grip strength in various material thicknesses
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental directives (RoHS 3, REACH)

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 2-56 UNC flat head screws deliver critical performance advantages in corrosive environments. The 316 Stainless Steel composition combined with passivated finish provides exceptional resistance to chemicals, saltwater, and industrial atmospheres, significantly extending service life in marine, chemical processing, and outdoor applications. The Class 3A thread fit ensures precise engagement with mating components, reducing the risk of cross-threading while maintaining consistent clamping force. The hex drive system (0.050") offers superior torque transmission compared to slotted drives, minimizing installation damage and improving assembly efficiency. The 82° countersink angle and flat head profile create flush surface finishes essential for aerodynamic surfaces, machinery guards, and precision equipment where protrusions are unacceptable.

Specification Summary & Compliance

This flat head screw maintains precise dimensional tolerances with Class 3A thread fit per UNC standards, ensuring consistent performance across industrial applications. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy and mechanical properties. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming restriction of hazardous substances. Critical dimensions include: 2-56 UNC thread, 1/4" length, 0.197" head diameter, and 0.050" hex drive size.