S-90283A107 4-40 x 5/16" ASME B18.6.3 Steel Pan Head Slotted Screws
Steel Pan Head Slotted 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 for extended service life in demanding environments
- High tensile strength of 60,000 PSI ensures reliable fastening under significant mechanical stress
- Rockwell B60 hardness provides excellent durability and resistance to wear during installation and use
- Class 2A thread fit offers optimal assembly clearance while maintaining secure connections
- Coarse UNC threading enables faster installation and reduced cross-threading risks
- Fully threaded design delivers maximum grip length and consistent holding power
- Slotted pan head design allows for easy installation with standard screwdrivers
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel screws provide exceptional engineering solutions for industrial applications requiring reliable fastening with corrosion resistance. The combination of 60,000 PSI tensile strength and Rockwell B60 hardness ensures these rounded pan head screws withstand vibration and mechanical stress in assembly operations. The coarse thread design facilitates quick installation while minimizing thread damage, making them ideal for production environments where efficiency matters. The slotted drive style offers compatibility with standard tools, while the fully threaded configuration ensures uniform load distribution across the entire fastener length. These characteristics make them particularly valuable in electronics, machinery, and equipment manufacturing where consistent performance and regulatory compliance are critical.
Specification Summary & Compliance
These rounded head screws feature precise Class 2A thread fit per UNC standards with 5/16" length and 4-40 thread size. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance. The products are RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety regulations for industrial components.
