S-99117A300 8-32 x 4" 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 for extended service life in demanding environments
- High tensile strength of 60,000 psi ensures reliable fastening under significant mechanical stress
- Rockwell B70 hardness provides excellent durability and resistance to wear during installation and use
- Class 2A thread fit offers optimal assembly efficiency while maintaining secure connections
- Phillips No. 2 drive design enables quick installation with standard tools, reducing assembly time
- Partial threading configuration allows for precise clamping force control in various material thicknesses
- Coarse UNC thread pattern ensures rapid installation and superior holding power in diverse materials
Professional Applications & Engineering Value
These 8-32 UNC zinc-plated steel rounded head screws deliver exceptional performance in industrial assembly applications where corrosion resistance and mechanical reliability are paramount. The zinc-plated steel construction provides superior protection against environmental factors, while the pan head profile with Phillips drive ensures flush mounting and tool compatibility. Engineered with partial threading, these fasteners excel in applications requiring precise gap adjustment and vibration resistance. The coarse thread design maintains secure fastening in softer materials and plastic components, making them ideal for electrical enclosures, machinery panels, and automotive assemblies where consistent clamping force and durability are critical requirements.
Specification Summary & Compliance
These rounded head screws feature precise Class 2A thread fit tolerances and UNC coarse thread specifications per industry standards. Manufacturing compliance includes ASME B18.6.3 dimensional requirements, ensuring interchangeability and reliability. Environmental regulations adherence is confirmed through RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, meeting the latest environmental safety standards for industrial components.
