S-99091A542 1/4"-20 x 1" Plastic Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance eliminates rust and degradation in humid or chemical environments, ensuring long-term reliability.
• Excellent electrical insulation properties prevent electrical conductivity, making them ideal for sensitive electronic assemblies.
• Lightweight nylon construction reduces overall assembly weight without compromising on mechanical strength.
• Wide operating temperature range from -40° to 185°F maintains performance in both freezing and elevated temperature conditions.
• UNC coarse threading with Class 2A fit provides quick assembly and secure fastening in various materials.
• External hex drive design allows for easy installation and removal with standard tools, improving workflow efficiency.
• RoHS 3 compliance ensures environmental safety and meets international regulatory standards for hazardous substances.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these 1/4-20 x 1" nylon hex head screws deliver critical advantages in electrical insulation and corrosion resistance. The black nylon plastic material inherently resists moisture, chemicals, and galvanic corrosion, making these fasteners ideal for outdoor, marine, and chemical processing equipment. Their non-conductive properties prevent short circuits in electrical enclosures, control panels, and PCB assemblies. The UNC coarse thread and Class 2A fit ensure reliable engagement in plastics, wood, and soft metals, reducing stripping and cross-threading risks. Fully threaded for maximum grip, they are perfect for lightweight applications where metal fasteners could add unnecessary weight or cause interference.

Specification Summary & Compliance

This fastener adheres to UNC coarse thread standards with a Class 2A thread fit for consistent dimensional accuracy and ease of assembly. Manufactured from durable nylon plastic, it is fully compliant with RoHS 3 (2015/863/EU) regulations, ensuring no restricted hazardous substances are present. The specifications include a 1/4"-20 thread size, 1" length, and external hex drive for reliable performance in industrial applications.