S-92224A121 4-40 x 7/8" 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 coating for extended service life in demanding industrial environments
- Superior holding power with 60,000 psi tensile strength and Rockwell B70 hardness for reliable fastening performance
- Quick installation with No. 1 Phillips drive design that prevents cam-out and reduces assembly time
- Precise thread engagement with Class 2A thread fit ensuring consistent mating with nuts and threaded components
- Versatile application compatibility through UNC coarse threading that resists vibration loosening
- Full-length threading provides maximum grip along the entire 7/8" shaft for superior load distribution
- Regulatory compliance meeting ASME B18.6.3 standards and environmental regulations including RoHS 3 and REACH
Professional Applications & Engineering Value
These black oxide steel rounded head screws deliver exceptional engineering value for industrial assembly applications where corrosion resistance and high tensile strength are critical. The 4-40 UNC coarse thread configuration provides excellent vibration resistance in machinery, electronic enclosures, and automotive components, while the pan head design with Phillips drive offers a low-profile fastening solution that prevents snagging. The combination of fully threaded construction and Class 2A thread fit ensures precise engagement with mating components, reducing the risk of cross-threading and assembly errors. This makes them ideal for production environments requiring consistent, reliable fastening performance with minimal maintenance requirements.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerance for precision mating. The 4-40 UNC coarse thread with right-hand orientation and 7/8" length provides standardized compatibility across industrial applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures these screws meet the latest international standards for hazardous substance restrictions and chemical safety.
