S-90279A092 3-48 x 1/4" ASME B18.6.3 Steel Round Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• High-strength performance with Rockwell B69 hardness ensuring reliable load-bearing capacity and resistance to deformation
• Quick and secure installation through fully threaded UNC coarse thread design for faster driving and strong holding power
• Precise thread engagement with Class 2A thread fit providing consistent, vibration-resistant connections
• Broad tool compatibility with Phillips No. 1 drive for easy integration into existing assembly processes
• Industry-standard compliance meeting ASME B18.6.3 specifications for guaranteed dimensional accuracy and performance
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated applications

Professional Applications & Engineering Value

These 3-48 UNC zinc-plated steel rounded head screws deliver exceptional engineering value in industrial fastening applications where corrosion resistance, mechanical strength, and assembly efficiency are critical. The combination of zinc-plated steel material and Rockwell B69 hardness provides superior protection against environmental degradation while maintaining structural integrity under stress. The fully threaded coarse UNC thread design ensures rapid installation and maximum thread engagement in various substrates, reducing assembly time while preventing loosening from vibration. The rounded head profile with Phillips No. 1 drive offers a clean appearance and reliable torque transmission, making these screws ideal for electronics enclosures, machinery components, and automotive assemblies where both performance and aesthetics matter. Their compliance with ASME B18.6.3 standards guarantees consistent quality and interchangeability across production runs.

Specification Summary & Compliance

Manufactured to exacting inch system dimensions with Class 2A thread fit tolerance for precise mating with standard nuts and threaded holes. These fully threaded 3-48 UNC coarse thread screws feature a 1/4" length and right-hand thread direction for standard applications. The product conforms to ASME B18.6.3 manufacturing specifications and demonstrates compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial markets.