S-90283A544 1/4"-20 x 1 1/4" ASME B18.6.3 Steel Pan Head Slotted Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Superior holding power with 60,000 psi tensile strength and Rockwell B60 hardness for reliable performance under heavy loads
• Quick installation and removal with standard slotted drive design compatible with common tools
• Optimized thread engagement through fully threaded UNC coarse thread design for maximum grip in various materials
• Precise Class 2A thread fit ensuring consistent performance and compatibility with standard nuts and components
• Regulatory compliance assurance meeting ASME B18.6.3 standards plus RoHS 3 and REACH environmental regulations
• Versatile pan head design providing a rounded, low-profile finish suitable for numerous industrial applications

Professional Applications & Engineering Value

This zinc-plated steel slotted pan head screw delivers exceptional engineering value through its robust material selection and precision threading. The UNC coarse thread configuration ensures rapid installation and superior resistance to vibration loosening in industrial equipment, machinery assembly, and structural applications. The fully threaded design maximizes surface contact area, distributing stress evenly across the entire fastener length to prevent concentration points that could lead to failure. The zinc plating provides a sacrificial layer that significantly extends service life in environments where moisture or chemical exposure would typically compromise fastener integrity. These rounded head screws are engineered to address common industrial challenges including corrosion-induced degradation, vibration-induced loosening, and the need for consistent, reliable fastening in high-stress applications.

Specification Summary & Compliance

This 1/4"-20 x 1-1/4" slotted pan head screw features precise Class 2A thread fit tolerances with UNC coarse thread spacing for optimal performance. Manufactured in compliance with ASME B18.6.3 specifications, ensuring dimensional accuracy and mechanical properties. The product meets stringent regulatory requirements including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, confirming environmental responsibility and safety standards adherence for industrial procurement.