S-90272A409 1/4"-28 x 1 1/2" ASME B18.6.3 Steel Pan Head Phillips Screws
Steel Pan Head Phillips Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc plating for extended service life in demanding industrial environments
- High tensile strength of 60,000 psi ensures reliable fastening under substantial mechanical loads
- Rockwell B70 hardness provides excellent durability and resistance to wear during installation and use
- Class 2A thread fit offers consistent, precise engagement for secure assemblies without binding
- Fully threaded design maximizes grip length and load distribution across the entire fastener
- Phillips No. 3 drive enables efficient installation with common tools while reducing cam-out risk
- Fine UNF threading delivers superior vibration resistance and clamping force in precision applications
Professional Applications & Engineering Value
These zinc-plated steel rounded head screws with 1/4-28 UNF fine threading provide exceptional engineering solutions for industrial applications requiring vibration resistance and reliable clamping force. The pan head profile offers a low-profile installation while the fully threaded design ensures maximum thread engagement in various material thicknesses. The combination of 60,000 psi tensile strength and Rockwell B70 hardness makes these fasteners ideal for machinery assembly, electrical enclosures, and automotive components where precision fastening and long-term reliability are critical. The Phillips drive system facilitates quick installation while maintaining torque transfer efficiency, reducing assembly time in high-volume production environments.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerance for consistent performance. These 1/4-28 UNF screws feature fine thread spacing and right-hand threading with precise dimensional control. The products are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring they meet the latest industry standards for hazardous substance restrictions and chemical safety in industrial applications.
