S-99477A101 2-56 x 3/16" 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
- High tensile strength of 4500 psi ensures reliable fastening in demanding industrial applications without risk of mechanical failure
- Wide temperature resistance from -20° to 180°F maintains structural integrity across diverse operating environments
- Polypropylene plastic construction provides excellent corrosion resistance and electrical insulation properties
- 5/64" hex drive socket head design enables secure tool engagement and precise installation in confined spaces
- Class 2A thread fit with UNC coarse threading delivers consistent engagement and vibration resistance
- Compliance with ASME B18.3 standards guarantees dimensional accuracy and interchangeability
- Off-white color and plastic material offer aesthetic consistency and non-conductive properties for sensitive applications
Professional Applications & Engineering Value
These polypropylene socket head cap screws solve critical challenges in electrical, chemical, and food processing industries where metal fasteners would corrode or conduct electricity. The 2-56 UNC coarse thread configuration provides rapid installation and superior vibration resistance in assembly lines, while the 4500 psi tensile strength ensures mechanical reliability in structural components. The 5/64" hex drive allows for high-torque applications in space-constrained environments, making these plastic fasteners ideal for electronic enclosures, medical devices, and laboratory equipment where temperature resistance from -20° to 180°F maintains performance across varying operational conditions.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 2A thread fit tolerance for precise engagement. Features right-hand UNC coarse threads with 2-56 thread size and standard socket head profile. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for global industrial applications.
