S-90471A435 8-32 x 5/8" 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 industrial environments
• High tensile strength of 60,000 psi ensures reliable fastening performance under substantial mechanical loads
• Optimized flush mounting with standard flat head profile and 100° countersink angle for seamless surface integration
• Quick installation efficiency through No. 2 Phillips drive design and coarse UNC threading
• Precision thread engagement with Class 2A fit providing consistent, vibration-resistant connections
• Full threading along 5/8" length delivers maximum grip depth and adjustment flexibility
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards

Professional Applications & Engineering Value

These zinc-plated steel flat head screws with 8-32 UNC coarse threading address critical challenges in industrial assembly where corrosion resistance, flush surface requirements, and high-strength fastening converge. The combination of Rockwell B70 hardness and 60,000 psi tensile strength ensures reliable performance in machinery, electrical enclosures, and automotive components where vibration and load stresses are prevalent. The 100° countersink angle and standard flat head profile enable perfect flush mounting in predrilled surfaces, eliminating protrusions that could interfere with moving parts or aesthetic requirements. The fully threaded design maximizes contact area throughout the 5/8" length, providing superior holding power in both soft and hard materials while the Phillips drive system facilitates efficient installation in high-volume production environments.

Specification Summary & Compliance

Manufactured to exacting ASME B18.6.3 standards with Class 2A thread fit tolerance for precision engagement. Features UNC coarse thread spacing with right-hand thread direction and fully threaded configuration. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. Dimensional specifications include 0.312" head diameter, 0.072" head height, and No. 2 Phillips drive size for standardized installation.