S-90273A145 6-32 x 5/16" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• High-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness for reliable, vibration-resistant fastening
• Precision thread engagement with Class 2A thread fit and UNC coarse threads ensuring consistent installation and reduced cross-threading risks
• Efficient flush mounting thanks to the standard 82° countersink angle and flat head design for seamless surface integration
• Quick installation with No. 2 Phillips drive providing secure tool engagement and reduced cam-out during high-torque applications
• Full thread coverage along the 5/16" length maximizes grip strength and distribution of clamping force
• Regulatory compliance assurance meeting ASME B18.6.3, RoHS 3, and REACH standards for quality and environmental safety

Professional Applications & Engineering Value

These 6-32 UNC flat head screws deliver exceptional value in industrial fastening applications where reliability and precision are critical. The zinc-plated steel material provides a durable barrier against oxidation and wear, making these screws ideal for machinery, electronics assembly, and automotive components exposed to varying environmental conditions. The combination of coarse UNC threads and Class 2A thread fit ensures rapid installation with minimal risk of stripping, while the fully threaded design offers uniform stress distribution across joined materials. The standard 82° countersink angle allows for flush mounting in pre-drilled holes, eliminating protrusions in tight spaces. With a No. 2 Phillips drive, these screws enable efficient torque transfer, reducing assembly time and improving workflow efficiency in high-volume production settings.

Specification Summary & Compliance

These screws feature precise Class 2A thread fit per UNC standards, ensuring consistent dimensional accuracy and compatibility with standard nuts and threaded holes. Manufacturing adheres to ASME B18.6.3 specifications for flat head screw geometry and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances and supporting sustainable procurement practices.