S-90283A110 4-40 x 1/2" 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
- Exceptional tensile strength rated at 60,000 psi ensures reliable fastening under substantial mechanical loads
- Optimized thread engagement with Class 2A UNC coarse threads provides secure installation and vibration resistance
- Easy installation and removal through standard slotted drive design compatible with common hand tools
- Full threading along 1/2" length enables maximum grip range and adjustment flexibility in assemblies
- Consistent dimensional accuracy maintained through ASME B18.6.3 manufacturing standards
- Environmental compliance assurance with RoHS 3 and REACH regulations for global market acceptance
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head screws deliver critical performance advantages in industrial fastening applications where corrosion resistance and mechanical reliability are paramount. The zinc-plated steel construction provides essential protection against environmental degradation, while the Rockwell B60 hardness ensures maintained thread integrity during repeated installations. The pan head design with slotted drive offers excellent torque transmission for secure fastening in electronic enclosures, machinery panels, and precision equipment assemblies. The coarse UNC threading enables rapid installation in production environments while maintaining Class 2A thread fit precision for consistent clamping force. These fully threaded screws distribute load evenly across the entire 1/2" length, preventing stress concentration and enhancing joint durability in vibration-prone applications.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for precise dimensional control. Features 4-40 UNC coarse threads with right-hand orientation and fully threaded 1/2" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial markets and restricted substance compliance.
