S-92224A239 1/4"-28 x 1/2" ASME B18.6.3 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black oxide steel coating, extending service life in demanding industrial environments
• Exceptional mechanical strength with 60,000 psi tensile strength and Rockwell B70 hardness for reliable performance under heavy loads
• Precision thread engagement with Class 2A thread fit and UNF fine threads ensuring secure, vibration-resistant connections
• Optimized drive efficiency featuring Phillips No. 3 drive for smooth installation and reduced cam-out during assembly
• Full-thread design providing maximum grip length and uniform stress distribution across the entire fastener
• Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH
• Versatile pan head design with rounded profile offering low-profile installation and improved aesthetic integration

Professional Applications & Engineering Value

These 1/4"-28 UNF pan head Phillips screws deliver critical performance advantages for industrial assembly applications where vibration resistance and long-term reliability are paramount. The black oxide steel construction provides essential corrosion protection while maintaining the 60,000 psi tensile strength required for heavy-duty fastening. The UNF fine thread configuration ensures superior clamping force retention in machinery, automotive components, and electronic enclosures where fine adjustment and secure fastening are essential. The combination of Class 2A thread fit and fully threaded design eliminates loosening concerns in high-vibration environments, while the Phillips No. 3 drive enables efficient installation without specialized tools. These rounded head screws are engineered to solve common industrial challenges including thread stripping, corrosion-induced failure, and assembly inefficiency.

Specification Summary & Compliance

This 1/4"-28 UNF screw features precise Class 2A thread fit tolerances and complies with ASME B18.6.3 manufacturing specifications. The fastener maintains dimensional accuracy with 0.25" thread diameter and 1/2" length in inch system measurements. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across various industrial sectors. The fully threaded design and fine thread spacing provide consistent performance meeting rigorous industrial fastening requirements.