S-91970A593 5/16"-18 x 2 1/2" Plastic Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance ensures long-term reliability in harsh environments like marine or chemical settings.
• Excellent electrical insulation properties prevent short circuits and enhance safety in electrical assemblies.
• Wide operating temperature range from -40° to 185°F maintains performance in extreme thermal conditions.
• External hex drive design allows for easy installation and removal with standard tools, improving assembly efficiency.
• Class 2A thread fit with UNC coarse threading provides secure, reliable fastening and reduces cross-threading risks.
• RoHS 3 compliance meets strict environmental regulations, ensuring safe and sustainable usage.
• Lightweight nylon construction reduces overall assembly weight without compromising strength.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these 5/16"-18 UNC nylon plastic hex head screws solve critical challenges in electrical and marine applications. The black nylon material inherently resists moisture, chemicals, and UV exposure, eliminating rust and galvanic corrosion issues common with metal fasteners. Their partial threading and coarse UNC thread form ensure rapid installation and vibration resistance, while the external hex drive accommodates high-torque applications. Ideal for electrical enclosures, control panels, and outdoor equipment, these screws provide durable, non-conductive fastening that maintains integrity across a -40° to 185°F temperature range.

Specification Summary & Compliance

This screw features a Class 2A thread fit with UNC coarse threads (5/16"-18), ensuring precise dimensional accuracy per inch system standards. The partial threading extends to a minimum of 7/8" on the 2 1/2" length shaft. Manufactured from durable nylon plastic, it complies with RoHS 3 (2015/863/EU) regulations, guaranteeing environmental safety and restricted substance-free composition.