S-91970A587 5/16"-18 x 1 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 construction eliminates rust and galvanic corrosion, ideal for electrical and chemical environments
- Wide temperature tolerance (-40° to 185°F) maintains structural integrity in both freezing and elevated temperature conditions
- External hex drive design provides secure tool engagement for efficient installation with standard wrenches
- Class 2A thread fit with UNC coarse threading ensures reliable engagement and faster assembly in various materials
- Partial threading configuration offers superior clamping force control for precise joint security
- RoHS 3 compliance guarantees environmental responsibility and regulatory acceptance for global markets
- Lightweight plastic composition reduces overall assembly weight while providing excellent electrical insulation
Professional Applications & Engineering Value
These 5/16"-18 UNC nylon hex head screws deliver exceptional value in applications where metal fasteners would compromise performance. The black nylon plastic construction provides inherent electrical insulation and chemical resistance, making them ideal for electrical enclosures, control panels, and marine components. The coarse UNC thread design ensures rapid installation in plastic housings and soft materials while maintaining Class 2A thread fit precision. With their external hex drive and partial threading, these fasteners solve common assembly challenges by preventing over-torquing in delicate materials and providing consistent clamp load distribution across the joint interface.
Specification Summary & Compliance
Manufactured to precise inch system dimensions featuring 5/16"-18 UNC coarse threads with Class 2A thread fit tolerances. The partially threaded design provides 7/8" minimum thread length on a 1-1/2" overall length. These hex head screws comply with RoHS 3 (2015/863/EU) environmental regulations and are engineered for reliable performance across industrial applications requiring non-conductive, non-magnetic fastening solutions.
