S-90276A112 4-40 x 5/8" ASME B18.6.3 Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance through zinc-plated steel construction, extending service life in demanding environments
• Exceptional 60,000 psi tensile strength ensures reliable performance under high-stress industrial applications
• Class 2A thread fit with UNC coarse spacing provides easier assembly and reduced cross-threading risks
• Fully threaded design delivers maximum grip and uniform load distribution across the entire fastener length
• Rockwell B69 hardness rating maintains structural integrity against deformation during installation
• Slotted drive compatibility allows for quick installation with standard screwdrivers
• Rounded head profile offers a finished appearance while minimizing snagging hazards

Professional Applications & Engineering Value

Engineered for precision assembly, these 4-40 UNC zinc-plated steel screws address critical industrial challenges including vibration resistance and environmental exposure. The coarse thread spacing combined with Class 2A thread fit ensures rapid installation in machinery, electronics, and automotive components where time efficiency matters. The zinc plating creates a sacrificial barrier against oxidation, particularly valuable in moisture-prone applications. With fully threaded construction maintaining consistent engagement depth, these rounded head slotted screws prevent loosening under dynamic loads while the 60,000 psi tensile strength provides a safety margin for high-stress connections in industrial equipment and manufacturing fixtures.

Specification Summary & Compliance

Manufactured to ASME B18.6.3 specifications with Class 2A thread tolerances ensuring dimensional accuracy. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features UNC coarse threads with 5/8" length and fully threaded design for consistent performance across industrial applications.