S-90585A023 2-56 x 3/16" 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 for extended service life in harsh environments
• Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under high stress
• 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 installation efficiency with hex drive (0.050") providing superior torque transfer and reduced tool slippage
• Full threading coverage across the 3/16" length for maximum grip strength and load distribution
• Regulatory compliance assurance meeting ASME B18.3 standards while being RoHS 3 and REACH compliant for global industrial use

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 2-56 UNC flat head screws address critical challenges in corrosive environments and high-stress assemblies. The 316 stainless steel material combined with passivated finish provides exceptional protection against chemical exposure and atmospheric corrosion, making them ideal for marine equipment, chemical processing plants, and food-grade machinery. The Class 3A thread fit and coarse UNC threading ensure rapid assembly while maintaining vibration resistance in dynamic operating conditions. With full threading and 82° countersink angle, these hex drive screws deliver uniform clamping force and flush surface mounting for precision equipment where protrusions are unacceptable. Their 70,000 psi tensile strength guarantees structural integrity in critical joints, while the Rockwell B55 hardness prevents thread deformation during repeated installations.

Specification Summary & Compliance

These flat head screws maintain precise dimensional tolerances with Class 3A thread fit per UNC standards and head diameter tolerance of -0.029" to 0". Manufacturing conforms to ASME B18.3 specifications for consistent quality and interchangeability. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and material safety in industrial supply chains.