S-90471A130 2-56 x 3/8" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• High tensile strength (60,000 psi) ensures reliable fastening under significant mechanical stress
• Optimized 100° countersink angle provides flush mounting and improved load distribution
• Class 2A thread fit with UNC coarse threading enables quick assembly and reduced cross-threading risks
• Full threading design maximizes grip strength across the entire fastener length
• Phillips drive compatibility offers widespread tool accessibility and efficient installation
• Rockwell B70 hardness rating maintains structural integrity against deformation during tightening

Professional Applications & Engineering Value

These zinc-plated steel flat head screws with 2-56 UNC threading deliver critical performance advantages for industrial assembly applications. The combination of 60,000 psi tensile strength and Rockwell B70 hardness provides exceptional resistance to vibrational loosening and shear forces, making them ideal for machinery, electronic enclosures, and automotive components. The 100° countersink angle ensures seamless surface integration while the Phillips drive system enables rapid installation with standard tools. The zinc plating offers essential corrosion protection for environments exposed to moisture or chemicals, significantly extending maintenance intervals and reducing lifecycle costs for industrial equipment manufacturers.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent dimensional accuracy. Features UNC coarse thread spacing with right-hand threading and fully threaded design. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.