S-90272A103 4-40 x 1/8" 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 thread engagement with coarse UNC threading and Class 2A fit, ensuring reliable fastening in various materials
- Enhanced driving efficiency through Phillips No. 1 drive design, reducing installation time and tool slippage
- Optimized load distribution with rounded pan head profile, minimizing surface damage during tightening
- Maximum thread coverage with fully threaded design, providing consistent holding power along the entire 1/8" length
- Durable mechanical performance with Rockwell B70 hardness, maintaining structural integrity under stress
- Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations for global applications
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head screws deliver exceptional engineering value across industrial applications where corrosion resistance and reliable fastening are critical. The coarse thread design provides superior bite in softer materials and faster installation in production environments, while the zinc plating creates a protective barrier against moisture and chemical exposure. The Phillips drive system ensures secure tool engagement during high-volume assembly operations, reducing workplace injuries from driver slippage. With their fully threaded configuration and Rockwell B70 hardness, these pan head screws maintain consistent clamping force in electronic enclosures, machinery panels, and automotive components where vibration resistance is essential for long-term performance.
Specification Summary & Compliance
Manufactured to precise inch system dimensions with Class 2A thread fit tolerance for consistent performance. These right-hand threaded fasteners comply with ASME B18.6.3 manufacturing specifications and feature UNC coarse threads for optimal engagement. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use in global industrial markets.
