S-99091A110 4-40 x 1/2" Plastic Hex Head Screws
Plastic Hex 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
- Corrosion-resistant nylon plastic construction ensures reliable performance in humid or chemical environments without rust or degradation.
- Wide temperature tolerance from -40° to 185°F maintains structural integrity in both freezing and elevated heat conditions.
- External hex drive with 3/16" head width allows for easy installation and removal using standard tools, reducing assembly time.
- Class 2A thread fit with UNC coarse threading provides secure, vibration-resistant fastening and minimizes cross-threading risks.
- Fully threaded 1/2" length design delivers maximum grip and holding power across the entire fastener for stable connections.
- RoHS 3 (2015/863/EU) compliance guarantees environmental safety and meets international regulatory standards for hazardous substances.
- Lightweight black nylon material offers electrical insulation and is ideal for non-conductive applications.
Professional Applications & Engineering Value
These 4-40 UNC nylon plastic hex head screws are engineered to address common industrial challenges such as corrosion, electrical conductivity, and weight sensitivity. The black nylon material provides excellent resistance to moisture, chemicals, and UV exposure, making them suitable for outdoor equipment, electronic enclosures, and automotive components. With a coarse thread and Class 2A thread fit, they ensure quick assembly and reliable performance in vibration-prone environments. The external hex drive facilitates efficient installation in tight spaces, while the fully threaded design enhances load distribution. Ideal for applications requiring temperature resistance from -40° to 185°F, these screws are a go-to solution for HVAC systems, consumer electronics, and machinery where metal fasteners are impractical.
Specification Summary & Compliance
This product adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy. Manufactured in the inch system, it features a 4-40 thread size, 1/2" length, and coarse thread spacing. Compliance includes RoHS 3 (2015/863/EU), ensuring it is free from hazardous substances and meets environmental regulations for safe use in various industries.
