S-90276A537 1/4"-20 x 1/2" ASME B18.6.3 Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust in demanding industrial environments
• High tensile strength of 60,000 psi ensures reliable performance under substantial mechanical loads
• Rockwell B69 hardness provides excellent durability and resistance to wear during installation and use
• Class 2A thread fit offers consistent, reliable engagement while maintaining easy assembly
• Fully threaded UNC coarse spacing delivers maximum holding power and faster installation in various materials
• Slotted drive design allows for quick, straightforward installation with standard tools
• Rounded head profile provides a finished appearance while minimizing snagging hazards

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these zinc-plated steel screws combine corrosion protection with high tensile strength to solve critical fastening challenges. The fully threaded UNC coarse spacing ensures maximum thread engagement in softer materials and faster assembly in production environments. With 60,000 psi tensile strength and Rockwell B69 hardness, these rounded head screws maintain integrity under vibration and load stress. The slotted drive accommodates standard tools for maintenance-friendly installations across machinery, equipment assembly, and structural applications where reliable fastening and environmental resistance are paramount.

Specification Summary & Compliance

Manufactured to precise ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent performance. Features 1/4"-20 UNC coarse threads 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 regulated industries.