Hex Lock Nuts Nylon Inserts Steel Zinc 4-40 are built for reliability in a variety of applications. The combination of a steel hex nut, a durable nylon locking insert, and a zinc finish delivers dependable locking action that resists vibration and loosening in compact assemblies.

Key Features

• Locking action: Nylon insert grips the bolt as it is tightened, creating a secure lock that resists vibration and prevents loosening.
• Material and finish: Steel with a durable zinc plating for corrosion resistance and longer service life in everyday environments.
• Thread size: 4-40 UNC, ideal for small, precision hardware projects and electronics applications.
• Head style: Hex nut design for easy installation and removal with standard wrenches.
• Nylon insert: Provides additional locking capability without requiring special tools or coatings.

Industries & Applications

• Electronics enclosures and electrical assemblies
• Precision machinery and instrumentation
• Automotive interiors and dashboards
• Robotics and hobbyist projects
• Small appliances and general hardware assemblies

Specifications

• Thread size: 4-40 UNC
• Material: Steel
• Finish: Zinc plating
• Locking insert: Nylon
• Head style: Hex