S-90272A406 1/4"-28 x 5/8" 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-plated steel construction, extending service life in demanding industrial environments
- Excellent holding power from fully threaded design and 60,000 psi tensile strength for reliable, vibration-resistant connections
- Precise thread engagement with Class 2A UNF fine threads ensuring consistent fit and reduced risk of cross-threading
- Optimized drive efficiency through Phillips No. 3 drive style and standard pan head profile for secure installation
- Enhanced durability with Rockwell B70 hardness maintaining structural integrity under repeated stress
- Broad compatibility with standard 1/4"-28 UNF fine thread applications across multiple industries
- Regulatory compliance meeting ASME B18.6.3 specifications and environmental standards for global procurement
Professional Applications & Engineering Value
These zinc-plated steel pan head screws deliver critical performance advantages in industrial assembly applications where vibration resistance and corrosion protection are paramount. The combination of UNF fine threading and Class 2A thread fit provides superior engagement in precision components, reducing the risk of loosening in high-stress environments. The fully threaded design maximizes surface contact area, distributing load evenly across the entire fastener length. With 60,000 psi tensile strength and Rockwell B70 hardness, these Phillips drive screws maintain clamping force in machinery, electrical enclosures, and automotive assemblies where consistent performance under dynamic loads is essential.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 standards with Class 2A thread fit precision and 1/4"-28 UNF fine thread specifications. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features include 5/8" length, 0.492" head diameter, and Phillips No. 3 drive size for standardized installation across industrial applications.
