S-91221A121 8-32 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 tensile strength of 17,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
- Wide temperature resistance from -40° to 200° F allows consistent operation in varied thermal environments without degradation.
- Lightweight and corrosion-resistant glass-filled nylon construction provides durability without adding significant weight or succumbing to rust.
- Precise Class 2A thread fit with UNC coarse threads ensures easy installation and secure fastening, minimizing assembly time and errors.
- Hex socket drive design offers superior torque transmission and access in confined spaces, enhancing installation efficiency.
- Compliance with ASME B18.3, RoHS 3, and REACH standards guarantees product reliability and environmental safety for global industrial use.
- Fully threaded rod design enables uniform load distribution and versatile fastening options across various material thicknesses.
Professional Applications & Engineering Value
These glass-filled nylon socket head cap screws are engineered to address common industrial challenges such as corrosion, electrical insulation, and weight reduction. The 8-32 UNC coarse thread with Class 2A fit ensures quick, reliable assembly in plastics, composites, and metals, reducing the risk of cross-threading. The off-white color and high-strength material make them ideal for applications in electronics, automotive, and machinery where non-conductive, temperature-resistant fasteners are critical. By combining ASME B18.3 compliance with robust performance, these screws enhance assembly integrity in harsh environments, minimizing maintenance and downtime.
Specification Summary & Compliance
This product adheres to Class 2A thread fit per UNC standards, ensuring dimensional accuracy and interchangeability. It meets ASME B18.3 specifications for socket head cap screws and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and industrial applications without hazardous substances.
