S-90272A407 1/4"-28 x 7/8" ASME B18.6.3 Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Superior holding power from 60,000 PSI tensile strength and Rockwell B70 hardness preventing stripping and deformation
• Precise thread engagement with Class 2A UNF fine threads ensuring secure fastening in critical applications
• Optimized drive performance featuring No. 3 Phillips drive for efficient installation with standard tools
• Maximum thread coverage through fully threaded design providing consistent clamping force along entire length
• Regulatory compliance assurance meeting ASME B18.6.3 specifications and environmental standards (RoHS 3 & REACH)
• Versatile pan head design with rounded profile offering broad bearing surface and clean aesthetic finish

Professional Applications & Engineering Value

Engineered for industrial applications requiring reliable fastening solutions, this zinc-plated steel screw combines material strength with precision manufacturing. The UNF fine thread configuration delivers superior vibration resistance compared to coarse threads, making it ideal for machinery, automotive assemblies, and electronic enclosures where loosening under dynamic loads is a concern. The Phillips pan head design ensures flush mounting while providing excellent torque transmission during installation. With fully threaded construction and Class 2A thread fit, engineers benefit from consistent clamping force distribution and reliable performance in high-stress applications. The corrosion-resistant zinc plating extends service life in moderate environmental conditions, while compliance with ASME B18.6.3 guarantees dimensional accuracy and interoperability with standard components.

Specification Summary & Compliance

This 1/4"-28 x 7/8" screw maintains Class 2A thread tolerance per UNF standards, ensuring precise fit with mating components. Manufacturing conforms to ASME B18.6.3 specifications for dimensional consistency and performance reliability. The product is certified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for industrial use. Thread direction is right-hand with fine pitch spacing, while the Rockwell B70 hardness and 60,000 PSI tensile strength validate mechanical performance requirements.