S-90272A412 1/4"-28 x 2" ASME B18.6.3 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding environments
• Exceptional holding power from fully threaded design and 60,000 psi tensile strength for reliable, vibration-resistant connections
• Precise thread engagement with Class 2A fit and UNF fine threads ensuring accurate alignment and reduced cross-threading risks
• Optimized drive efficiency featuring No. 3 Phillips drive for secure tool engagement and reduced cam-out during installation
• Enhanced durability with Rockwell B70 hardness providing excellent resistance to wear and deformation under load
• Broad industry compliance meeting ASME B18.6.3 specifications and environmental regulations including RoHS 3 and REACH
• Versatile pan head profile offering balanced bearing surface for stable fastening across various material thicknesses

Professional Applications & Engineering Value

Engineered for industrial applications requiring precision and reliability, these zinc-plated steel screws deliver critical corrosion protection in manufacturing, machinery assembly, and outdoor equipment. The UNF fine thread configuration provides superior resistance to vibrational loosening compared to coarse threads, while the Class 2A thread fit ensures consistent engagement in tapped holes and nuts. The combination of 60,000 psi tensile strength and fully threaded design maximizes clamp load distribution, making these rounded head Phillips screws ideal for applications where joint integrity is paramount. The standardized pan head profile accommodates standard wrench clearances while the zinc plating creates a sacrificial layer that significantly extends service life in humid or chemically aggressive environments.

Specification Summary & Compliance

This fastener maintains Class 2A thread fit tolerances per UNF standards with precise 1/4"-28 fine threading and full compliance with ASME B18.6.3 manufacturing specifications. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations for chemical safety. Manufacturing controls ensure dimensional accuracy across all critical parameters including head diameter (0.492"), length (2"), and thread diameter (0.25") for consistent performance in precision applications.