S-90273A207 8-32 x 2 1/2" ASME B18.6.3 Steel Phillips Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that extends service life in demanding industrial environments
• High tensile strength of 60,000 psi ensures reliable fastening under substantial mechanical loads
• Rockwell B70 hardness provides excellent resistance to wear and deformation during installation
• Class 2A thread fit offers consistent, reliable engagement while maintaining easy assembly
• 82° countersink angle with standard flat head profile creates flush surfaces for improved aesthetics and safety
• Phillips No. 2 drive design enables efficient installation with common tools while reducing cam-out risk
• UNC coarse threading provides faster installation and better performance in softer materials

Professional Applications & Engineering Value

These zinc-plated steel flat head screws deliver exceptional performance in industrial assembly applications where flush mounting and corrosion resistance are critical. The 8-32 UNC coarse thread configuration ensures rapid installation in metal, plastic, and composite materials, while the partial threading design provides optimal clamping force distribution. The 60,000 psi tensile strength and Rockwell B70 hardness make these Phillips drive screws ideal for machinery, electrical enclosures, and structural components requiring reliable, vibration-resistant fastening solutions that maintain integrity under continuous stress.

Specification Summary & Compliance

This 2-1/2 inch flat head screw features precise Class 2A thread fit tolerances and UNC coarse threading per established industrial standards. Manufactured in compliance with ASME B18.6.3 specifications for dimensional accuracy and performance. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors without hazardous substance restrictions.