S-90273A416 4-40 x 7/16" ASME B18.6.3 Steel Phillips Flat Head Screws
Steel Phillips Flat Head 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 plating for extended service life in demanding industrial environments
- High tensile strength of 60,000 psi ensures reliable fastening under mechanical stress and vibration
- Precise Class 2A thread fit guarantees smooth assembly and consistent clamping force in machined components
- 82° countersink angle with flat head design provides flush mounting for clean, aerodynamic surfaces
- Phillips No. 1 drive compatibility enables efficient installation with standard industrial tools
- Coarse UNC threading offers rapid installation and reduced cross-threading risks in production lines
- Full compliance with ASME B18.6.3 ensures dimensional accuracy and interchangeability in precision assemblies
Professional Applications & Engineering Value
These 4-40 UNC flat head screws deliver critical performance advantages in industrial fastening applications where surface flushness and corrosion resistance are paramount. The zinc-plated steel construction combined with Rockwell B70 hardness provides optimal balance between durability and machinability, preventing galvanic corrosion while maintaining structural integrity. The 82° countersink angle ensures seamless integration into precision machinery, electronic enclosures, and automotive components, eliminating protrusions that could interfere with moving parts. The fully threaded design with coarse UNC threading enables maximum thread engagement in thin materials, solving common challenges of strip-out and loosening in high-vibration environments. These Phillips drive screws are engineered for rapid assembly in manufacturing settings while meeting strict dimensional requirements for ASME B18.6.3 compliant applications.
Specification Summary & Compliance
Manufactured to exacting Class 2A thread fit tolerances with UNC coarse threading (4-40 thread size) and 7/16" length. Fully compliant with ASME B18.6.3 dimensional standards, RoHS 3 (2015/863/EU) hazardous substance restrictions, and REACH (EC 1907/2006) chemical safety regulations. The zinc-plated steel construction delivers consistent 60,000 psi tensile strength with Rockwell B70 hardness for reliable performance in industrial fastening applications.
