S-91970A537 1/4"-20 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
- Excellent corrosion resistance ensures long-term reliability in harsh environments without rust or degradation.
- Superior electrical insulation properties prevent electrical conductivity, reducing short-circuit risks in sensitive applications.
- Wide operating temperature range from -40° to 185°F maintains performance in both extreme cold and moderate heat conditions.
- Coarse UNC threading with Class 2A fit provides easy installation and secure fastening with consistent thread engagement.
- External hex drive design allows for quick, tool-friendly assembly and disassembly using standard wrenches.
- Fully threaded shank offers maximum grip length and uniform clamping force along the entire fastener.
- RoHS 3 compliance guarantees environmentally safe manufacturing and adherence to international regulatory standards.
Professional Applications & Engineering Value
These 1/4-20 UNC nylon hex head screws deliver critical advantages in industries where metal fasteners fail. The black nylon plastic construction inherently resists moisture, chemicals, and galvanic corrosion, making them ideal for electrical enclosures, marine equipment, and outdoor structures. Their non-conductive properties eliminate electrical grounding issues in electronic assemblies and control panels. With a coarse thread and Class 2A fit, they ensure rapid installation and reliable performance in plastics and soft materials, reducing stripping risks. The fully threaded design and external hex drive provide uniform load distribution and easy access in confined spaces, streamlining maintenance and assembly processes for industrial operators.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for standard tolerance and compatibility. It is manufactured from durable nylon plastic with a black finish, fully threaded along a 1/2" length, and designed with an external hex drive (7/16" head width, 3/16" head height). The product is fully RoHS 3 (2015/863/EU) Compliant, meeting stringent environmental and safety regulations for hazardous substance restrictions.
