S-94812A683 5/8"-18 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance from Nylon 6/6 material, ideal for harsh environments without risk of rust or chemical degradation.
• Excellent thermal stability with a wide operating range from -40° to 185°F, ensuring reliable performance under varying temperature conditions.
• Precise Class 2B thread fit for smooth assembly and secure fastening, reducing the risk of cross-threading and improving joint integrity.
• Fine UNF thread design provides higher tensile strength and better vibration resistance compared to coarse threads in demanding applications.
• Standard external hex drive allows for easy installation and removal with common tools, speeding up maintenance and assembly processes.
• Lightweight and non-conductive properties reduce overall system weight and prevent electrical conductivity, enhancing safety in electrical assemblies.
• RoHS 3 compliance ensures environmental safety and meets global regulatory standards for hazardous substance restrictions.

Professional Applications & Engineering Value

This 5/8"-18 UNF Nylon 6/6 plastic hex nut delivers critical advantages in industrial settings where metal fasteners fall short. Its Nylon 6/6 construction inherently resists corrosion from moisture, chemicals, and salts, eliminating the need for additional coatings and reducing long-term maintenance costs. The fine UNF thread and Class 2B fit ensure tight, reliable connections in high-vibration environments like machinery, automotive systems, and electrical enclosures, preventing loosening over time. With a temperature range of -40° to 185°F, it performs consistently in both freezing and elevated heat conditions, making it suitable for outdoor equipment, HVAC systems, and packaging machinery. The external hex drive and standard profile facilitate quick installation, boosting efficiency in assembly lines while the non-metallic material prevents galvanic corrosion when used with dissimilar metals.

Specification Summary & Compliance

This hex nut features a 5/8"-18 UNF fine thread with right-hand direction and Class 2B thread fit, adhering to standard inch measurement tolerances for precise engagement. Dimensions include a 15/16" width and 9/16" height with a standard hex profile for external drive compatibility. It is manufactured from Nylon 6/6 plastic and complies with RoHS 3 (2015/863/EU) regulations, ensuring it is free from restricted hazardous substances. The product meets common industry standards for plastic fasteners in mechanical and electrical applications.