S-92929A134 4-40 x 1/2" ASME B18.6.3 Plastic Slotted Flat Head Screws
Plastic Slotted 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 eliminates rust concerns in humid or chemical environments, extending service life
- Excellent electrical insulation properties prevent current leakage and short circuits in electrical assemblies
- Wide temperature tolerance from -40° to 185°F ensures reliable performance in both extreme cold and heat
- Class 2A thread fit provides consistent engagement and reliable fastening in coarse UNC threading applications
- Standard 82° countersink angle enables flush mounting for clean, professional-looking finished surfaces
- Full threading design maximizes grip strength and distributes load evenly across the entire fastener length
- RoHS 3 compliance ensures environmental responsibility and global regulatory acceptance
Professional Applications & Engineering Value
These nylon plastic flat head screws deliver critical engineering advantages where metal fasteners fail. The non-conductive properties make them ideal for electrical enclosures, control panels, and electronic assemblies where electrical insulation is paramount. Their inherent corrosion resistance solves persistent issues in marine, chemical processing, and outdoor applications where moisture and chemicals degrade metal components. The 4-40 UNC coarse threading with Class 2A fit ensures quick installation and reliable holding power in plastic, wood, and soft metal substrates. The standard 82° countersink provides seamless integration into angled recesses, creating smooth surfaces that won't snag or interfere with moving parts.
Specification Summary & Compliance
This 4-40 UNC nylon flat head screw features precise Class 2A thread fit tolerances per unified thread standards, ensuring consistent performance across applications. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and mechanical requirements. The product meets RoHS 3 (2015/863/EU) compliance standards, containing no restricted hazardous substances. The 1/2" length and fully threaded design provide maximum versatility for various assembly depths while maintaining structural integrity across the specified -40° to 185°F temperature range.
