S-90276A552 1/4"-20 x 2 1/2" ASME B18.6.3 Steel Round Head Slotted Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Reliable high-strength performance with 60,000 PSI tensile strength and Rockwell B69 hardness for heavy-duty applications
• Optimized thread engagement through UNC coarse threading and Class 2A fit ensuring secure fastening and vibration resistance
• Easy installation and removal with standard slotted drive design compatible with common hand tools
• Versatile partial threading allowing precise clamping force control across various material thicknesses
• Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and interchangeability
• Environmental regulation adherence with RoHS 3 and REACH compliance for global manufacturing applications

Professional Applications & Engineering Value

This zinc-plated steel rounded head screw delivers critical engineering advantages for industrial assembly operations. The UNC coarse thread design significantly reduces cross-threading risks during high-volume installation while maintaining strong holding power in wood, metal, and composite materials. The partial threading configuration enables precise joint compression control, preventing material damage in sensitive applications. With its 60,000 PSI tensile strength and corrosion-resistant plating, this fastener solves common challenges in outdoor equipment, machinery guards, and structural frameworks where vibration resistance and environmental durability are paramount. The standardized rounded head profile and slotted drive ensure compatibility with existing tooling systems, streamlining maintenance and repair operations across multiple industrial sectors.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with Class 2A thread fit tolerance for consistent performance. Complies with ASME B18.6.3 mechanical and dimensional specifications. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards. Features UNC coarse thread profile with right-hand threading direction, 1/4"-20 thread size, and 2-1/2" overall length with minimum 1-1/2" thread length.