S-92929A136 4-40 x 5/8" 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 and chemical degradation in harsh environments
- Excellent electrical insulation properties prevent current leakage and short circuits
- Wide temperature tolerance from -40° to 185°F ensures reliable performance across diverse operating conditions
- Precision Class 2A thread fit provides consistent engagement and secure fastening
- Standard 82° countersink angle enables flush mounting for clean, professional finishes
- RoHS 3 compliance meets stringent environmental regulations for global manufacturing
- Coarse UNC threading offers quick installation and superior holding power in plastic materials
Professional Applications & Engineering Value
This 4-40 UNC nylon plastic flat head screw delivers critical engineering advantages where metal fasteners fail. The nylon construction provides inherent corrosion resistance, making it ideal for chemical processing, marine, and outdoor applications where moisture and corrosive agents are present. Its electrical insulation properties are essential in electronics assembly, preventing ground faults in electrical enclosures and circuit boards. The slotted drive combined with coarse threading ensures rapid installation in plastic components and soft materials, while the standard 82° countersink creates seamless surfaces in panels and housings. These features make it particularly valuable for electrical insulation applications and environments requiring non-conductive, non-magnetic fastening solutions.
Specification Summary & Compliance
This fully threaded screw features 4-40 UNC coarse threading with Class 2A thread fit for consistent dimensional accuracy. Manufactured to ASME B18.6.3 specifications, it ensures interchangeability and reliability in industrial applications. The product is RoHS 3 (2015/863/EU) compliant, meeting current environmental regulations for hazardous substance restrictions. With right-hand threading and standard flat head profile, it maintains proper alignment and seating in countersunk applications.
