S-92929A135 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
- Corrosion-resistant nylon plastic construction eliminates rust and galvanic corrosion in harsh environments
- Excellent electrical insulation properties prevent current leakage and short circuits in electrical assemblies
- Wide temperature tolerance (-40° to 185°F) maintains performance in both extreme cold and moderate heat applications
- 100° countersink angle with flat head design provides flush mounting for clean, snag-free surface finishes
- Class 2A thread fit with UNC coarse threading ensures smooth installation and reliable holding power
- Full threading along 1/2" length maximizes engagement depth and distributes load evenly
- RoHS 3 and ASME B18.6.3 compliance guarantees environmental safety and mechanical reliability
Professional Applications & Engineering Value
These nylon plastic flat head screws solve critical engineering challenges where metal fasteners fail. The non-conductive properties make them ideal for electrical enclosures, control panels, and PCB mounting where electrical isolation is mandatory. Their chemical and corrosion resistance ensures longevity in humid, chemical-exposed, or marine environments without degradation. The 100° countersink angle combined with UNC coarse threads provides superior pull-out resistance in plastic and soft material assemblies. These ASME B18.6.3 compliant fasteners deliver consistent performance in automotive trim, consumer electronics, and food processing equipment where temperature fluctuations and corrosion prevention are operational necessities.
Specification Summary & Compliance
This 4-40 UNC coarse thread screw features precise Class 2A thread fit tolerances with right-hand threading and standard flat head profile. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and mechanical performance. The product is fully RoHS 3 (2015/863/EU) compliant and operates reliably within the specified -40° to 185°F temperature range. All dimensions including 0.225" head diameter and 1/2" length maintain consistent industrial standards for interchangeability.
