S-91440A633 2-56 x 1/4" ASME B18.6.3 Steel Round Head Combination Phillips/Slotted Screws
Steel Round Head Combination Phillips/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
- Enhanced installation flexibility through dual Phillips/Slotted drive design accommodating various tool types
- Reliable thread engagement with Class 2A thread fit ensuring consistent fastening performance
- Optimized for rapid assembly featuring coarse UNC threads that reduce installation time and cross-threading risks
- Maximum grip strength achieved through fully threaded design along the entire 1/4" length
- Industry-standard compatibility with rounded head profile meeting ASME B18.6.3 specifications
- Environmental compliance assurance with RoHS 3 and REACH regulations for global manufacturing applications
Professional Applications & Engineering Value
These 2-56 UNC zinc-plated steel rounded head screws deliver critical performance advantages in industrial fastening scenarios where corrosion resistance and reliable installation are paramount. The zinc-plated steel construction provides essential protection against environmental degradation, while the coarse thread spacing enables quick assembly in production environments. The combination of Phillips/Slotted drive style offers installation versatility for maintenance teams using different tool types. Engineered with fully threaded design and Class 2A thread fit, these screws maintain consistent clamping force in electronic enclosures, machinery components, and light assembly applications where vibration resistance and long-term fastener integrity are essential requirements.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit tolerance and UNC coarse thread profile measuring 2-56 thread size. Complies with ASME B18.6.3 manufacturing specifications for dimensional accuracy and performance. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for hazardous substance restrictions. Features right-hand thread direction, No. 1 drive size, and standardized rounded head profile for consistent performance across industrial applications.
