S-90272A531 1/4"-20 x 1/4" ASME B18.6.3 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Exceptional holding power with 60,000 psi tensile strength and Rockwell B70 hardness for reliable, heavy-duty fastening
• Quick installation and removal with No. 3 Phillips drive and fully threaded design for maximum engagement efficiency
• Consistent thread engagement with Class 2A thread fit and UNC coarse threads for vibration-resistant assemblies
• Broad compatibility with standard 1/4"-20 components and rounded pan head profile for flush mounting applications
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards including RoHS 3 and REACH
• Optimized load distribution through rounded head design that minimizes surface damage during tightening

Professional Applications & Engineering Value

These zinc-plated steel rounded head screws with 1/4"-20 UNC coarse threading deliver critical performance advantages for industrial assembly applications. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable fastening in high-stress environments where vibration resistance is paramount. The fully threaded design provides maximum grip length and superior holding power across the entire fastener length, while the zinc plating offers essential corrosion protection for extended service life in manufacturing, machinery, and equipment applications. The No. 3 Phillips drive enables efficient installation with standard tools, reducing assembly time without compromising fastener integrity.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse thread profile ensuring consistent engagement and reliable performance. These screws conform to ASME B18.6.3 specifications for dimensional accuracy and mechanical properties. Environmental compliance is verified through RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance regarding restricted substances, making them suitable for global industrial applications requiring certified components.