S-99477A102 2-56 x 1/4" ASME B18.3, UL 94 HB Plastic Socket Head Screws
Plastic Socket 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
- Exceptional corrosion resistance with polypropylene plastic construction, ideal for harsh chemical environments and outdoor applications
- Reliable 4500 psi tensile strength provides secure fastening for medium-duty industrial assemblies without risk of metal corrosion
- Broad temperature tolerance (-20° to 180°F) maintains performance integrity across diverse operating conditions
- Precision Class 2A thread fit ensures smooth installation and consistent clamping force in UNC coarse thread applications
- Compact 5/64" hex drive design enables tool access in confined spaces while preventing stripping common with smaller drives
- Full regulatory compliance including ASME B18.3, RoHS 3, and REACH standards for global manufacturing acceptance
- Non-conductive, non-magnetic properties make these socket head cap screws perfect for electrical and sensitive equipment
Professional Applications & Engineering Value
Engineered for precision assemblies requiring chemical resistance and electrical insulation, these polypropylene plastic socket head cap screws solve critical challenges in electronics enclosures, food processing equipment, and laboratory instrumentation. The 2-56 UNC coarse thread configuration delivers rapid installation while maintaining vibration resistance in plastic-to-plastic or plastic-to-metal joints. With 4500 psi tensile strength and stable performance across extreme temperature fluctuations (-20° to 180°F), these fasteners prevent galvanic corrosion in mixed-material assemblies while meeting stringent ASME B18.3 specifications for dimensional consistency. The off-white color provides visual contrast for quality control inspections in automated manufacturing environments.
Specification Summary & Compliance
This 1/4" length socket head cap screw features precision Class 2A thread fit per UNC standards with 5/64" hex drive compatibility. Manufactured to ASME B18.3 dimensional specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The polypropylene construction meets UL 94 HB flammability ratings, ensuring suitability for industrial applications requiring certified plastic fasteners.
