S-91221A153 8-32 x 3/4" 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 glass-filled nylon construction, eliminating rust and chemical degradation in harsh environments
- High tensile strength of 17,000 psi provides reliable load-bearing capacity for demanding mechanical assemblies
- Wide temperature tolerance (-40° to 200°F) ensures stable performance across industrial and outdoor applications
- Precision Class 2A thread fit guarantees consistent engagement and vibration resistance in UNC coarse threaded connections
- Standard hex socket drive (9/64") enables secure tool engagement and streamlined installation in confined spaces
- Full threading along 3/4" length offers maximum adjustment flexibility and uniform clamping force distribution
- Regulatory compliance with ASME B18.3, RoHS 3, and REACH standards ensures material safety and interoperability
Professional Applications & Engineering Value
Engineered for precision assemblies requiring electrical insulation, chemical resistance, and weight reduction, these glass-filled nylon socket head cap screws solve critical challenges in electronics enclosures, food processing equipment, and marine components. The black glass-filled nylon material maintains dimensional stability under thermal cycling while preventing galvanic corrosion when mating with dissimilar metals. With UNC coarse threading and Class 2A thread fit, these fasteners provide rapid installation in plastic and soft metal substrates while resisting vibrational loosening. The socket head design with 9/64" hex drive accommodates high-torque applications where flush mounting and tool access are constrained.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 2A thread tolerances for unified coarse (UNC) 8-32 threading. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations regarding hazardous substances. The glass-filled nylon construction delivers consistent mechanical properties across the specified -40° to 200°F operating range while maintaining 17,000 psi tensile strength.
