S-93140A706 4-40 x 1/4" 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 temperature resistance maintains structural integrity from -40° to 210°F, ideal for environments with thermal fluctuations
- Excellent corrosion resistance due to polycarbonate construction, eliminating rust concerns in humid or chemical-exposed applications
- Precision Class 2A thread fit ensures smooth installation and reliable fastening in demanding assemblies
- Full threading design provides maximum grip strength along the entire shank for enhanced load distribution
- Optical clarity allows visual inspection of assembled components while maintaining discreet appearance
- Standard 82° countersink angle enables flush mounting for streamlined surfaces and reduced snag hazards
- RoHS 3 & REACH compliance guarantees environmental safety and regulatory acceptance for global supply chains
Professional Applications & Engineering Value
These 4-40 UNC flat head slotted screws deliver critical performance advantages in precision-driven industries. The polycarbonate plastic construction provides inherent electrical insulation properties while resisting chemical degradation, making them ideal for electronic enclosures, medical devices, and optical equipment assemblies. The clear transparency enables visual verification of component alignment without disassembly, significantly reducing maintenance downtime. With coarse UNC threading and Class 2A tolerance, these fasteners ensure rapid installation in plastic and soft material applications while maintaining vibration resistance. The fully threaded design maximizes pull-out strength in thin-section materials, addressing common failure points in lightweight structural assemblies.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread fit and UNC coarse threading (4-40 size). Features standard 82° countersink angle and right-hand thread direction. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Temperature rating spans from -40° to 210°F with fully threaded 1/4" length configuration.
