S-99091A078 2-56 x 5/16" Plastic Hex Head Screws
Plastic Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance from black nylon plastic construction, eliminating rust and chemical degradation in harsh environments
- Excellent electrical insulation properties for safe use in electrical assemblies and sensitive electronic applications
- Reliable installation and removal with external hex drive design providing secure tool engagement and torque transmission
- Broad temperature tolerance (-40° to 185°F) ensuring stable performance across diverse operating conditions
- Precision threading with Class 2A fit for consistent engagement and vibration resistance in coarse thread applications
- Environmental compliance assurance through RoHS 3 compliance, meeting strict international regulatory standards
- Lightweight non-conductive alternative to metal fasteners, reducing component weight while preventing galvanic corrosion
Professional Applications & Engineering Value
These 2-56 UNC nylon hex head screws deliver critical engineering advantages where metal fasteners fail. The black nylon plastic construction provides inherent corrosion resistance, making them ideal for humid, chemical, or marine environments where stainless steel might still corrode. Their electrical insulation properties prevent short circuits in electronic enclosures, control panels, and PCB mounting applications. The coarse UNC thread with Class 2A fit ensures rapid assembly in plastic and soft materials while maintaining vibration resistance. The external hex drive offers familiar, secure tooling for maintenance personnel. From automotive electronics to food processing equipment and outdoor telecommunications, these screws solve conductivity, weight, and corrosion challenges while maintaining temperature resistance across most industrial operating ranges.
Specification Summary & Compliance
Manufactured to UNC coarse thread standards with Class 2A thread fit for consistent dimensional accuracy. Features 2-56 thread size with 0.086" diameter and 5/16" length in inch system measurements. Fully compliant with RoHS 3 (2015/863/EU) environmental regulations, containing no restricted hazardous substances. The fully threaded design provides maximum holding power across the entire fastener length.
