S-92224A238 1/4"-28 x 3/8" 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
- Enhanced corrosion resistance with black oxide steel coating for extended service life in demanding environments
- Superior holding power from fully threaded design ensuring maximum engagement and vibration resistance
- Precise thread engagement with Class 2A fine UNF threads for reliable fastening in precision assemblies
- High tensile strength rated at 60,000 psi for critical load-bearing applications
- Optimized drive efficiency with No. 3 Phillips drive providing secure tool engagement and reduced cam-out
- Consistent performance backed by Rockwell B70 hardness for maintained thread integrity under stress
- Regulatory compliance meeting ASME B18.6.3, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These 1/4"-28 UNF rounded head Phillips screws deliver exceptional engineering value through their black oxide steel construction and fine thread design. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance in high-stress applications where fastener failure is not an option. The fully threaded configuration provides maximum thread engagement along the entire shank, distributing clamping force evenly and preventing loosening from vibration - a critical advantage in machinery, automotive, and electronic enclosures. The pan head profile offers a low-profile seating surface while the No. 3 Phillips drive enables efficient installation in confined spaces. These industrial screws solve common assembly challenges by maintaining dimensional stability and corrosion resistance in demanding operating conditions.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNF fine threads (1/4"-28) and right-hand thread direction. Complies with ASME B18.6.3 manufacturing specifications for dimensional accuracy and performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for restricted substances. Features standard rounded pan head profile with 0.492" diameter and 3/8" length.
