S-99091A077 2-56 x 1/4" 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
- Excellent corrosion resistance due to nylon plastic construction, ideal for humid or chemical environments without risk of rust
- Secure, vibration-resistant fastening with coarse UNC threads and Class 2A fit ensuring reliable hold in various materials
- Easy installation and removal with external hex drive and standard 1/8" head width for common tool compatibility
- Broad temperature tolerance from -40°F to 185°F, maintaining integrity in fluctuating industrial conditions
- Lightweight and non-conductive properties perfect for electrical insulation and weight-sensitive assemblies
- Full threading along the 1/4" length provides maximum grip and uniform stress distribution
- Environmentally safe compliance with RoHS 3 standards, meeting global regulatory requirements for hazardous substances
Professional Applications & Engineering Value
These 2-56 UNC nylon plastic hex head screws deliver exceptional value in applications where metal fasteners fail. The black nylon material inherently resists corrosion, oxidation, and galvanic reactions, making them perfect for electronics, marine equipment, and food processing machinery. With a coarse thread design and Class 2A thread fit, they offer quick assembly and reduced cross-threading risks in plastic or soft metal components. The external hex drive allows for high-torque installation without stripping, while the temperature range of -40°F to 185°F ensures performance in both freezing and moderately heated environments. These screws are widely used in PCB mounting, enclosure securing, and lightweight framing where electrical insulation and chemical stability are critical.
Specification Summary & Compliance
This product adheres to Unified Coarse (UNC) thread standards with a Class 2A thread fit for consistent dimensional accuracy and interchangeability. The screw features a 2-56 thread size, 0.086" thread diameter, and 1/4" length with full threading. It is manufactured in compliance with RoHS 3 (2015/863/EU), ensuring absence of restricted hazardous substances. The right-hand thread direction and coarse thread spacing align with industry norms for reliable performance in commercial and industrial fastening applications.
