S-99091A112 4-40 x 5/8" 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
- Superior corrosion resistance thanks to durable nylon plastic construction, eliminating rust issues in humid or chemical environments
- Wide operating temperature range from -40° to 185°F maintains integrity in both freezing and elevated temperature applications
- Easy installation and removal with external hex drive design providing reliable torque transfer and tool accessibility
- Secure thread engagement with Class 2A UNC coarse threads ensuring consistent fastening in various materials
- Full threading along 5/8" length delivers maximum grip strength and adjustment flexibility
- RoHS 3 compliance guarantees environmentally safe composition for regulated industrial sectors
- Lightweight non-conductive properties prevent electrical conductivity and reduce overall assembly weight
Professional Applications & Engineering Value
These 4-40 UNC nylon plastic hex head screws solve critical challenges in electrical, automotive, and marine applications where metal fasteners fail. The black nylon material provides inherent corrosion resistance without additional coatings, making them ideal for harsh environments where moisture, chemicals, or salt exposure would degrade metal alternatives. The coarse UNC thread design ensures reliable performance in plastic and soft materials, while the external hex drive allows for high-torque installation without stripping. Engineers specify these temperature resistant fasteners for applications ranging from electronic enclosures to food processing equipment, where non-conductivity and thermal stability between -40° to 185°F are essential.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit standards with UNC coarse threads (4-40 size, 0.112" diameter). Features fully threaded 5/8" length with right-hand thread direction. Compliant with RoHS 3 (2015/863/EU) environmental regulations, ensuring lead-free and hazardous substance-free composition for global industrial applications.
