S-91221A187 1/4"-20 x 1 1/2" 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
- Superior chemical resistance from glass-filled nylon construction prevents degradation in harsh industrial environments
- Excellent thermal stability maintains performance across wide temperature range (-20° to 230°F)
- Reliable torque transmission with 3/16" hex drive socket for secure fastening operations
- Precise thread engagement with Class 2A UNC coarse threads ensuring consistent assembly quality
- Full-threaded design provides maximum grip strength throughout the entire fastener length
- Comprehensive compliance with UL 94 HB, RoHS 3, and REACH standards for global market acceptance
- Durable black finish offers consistent appearance and additional protection in demanding applications
Professional Applications & Engineering Value
These glass-filled nylon socket head cap screws deliver exceptional performance in corrosive and temperature-sensitive environments where metal fasteners would fail. The 1/4"-20 UNC coarse thread configuration provides rapid installation with reliable holding power, while the hex drive socket ensures positive torque application without slippage. Engineered for electrical enclosures, chemical processing equipment, and food-grade machinery, these plastic fasteners eliminate galvanic corrosion concerns and provide excellent insulation properties. The fully threaded design maximizes engagement in various material thicknesses, making them ideal for adjustable assemblies and components requiring frequent maintenance access.
Specification Summary & Compliance
This socket head cap screw features precise Class 2A thread fit with UNC coarse threads (1/4"-20) and standard inch dimensions. Manufactured to meet UL 94 HB flammability requirements with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The right-hand thread direction and fully threaded rod construction ensure consistent performance across industrial applications requiring reliable plastic fastening solutions.
