Shri Aarohi Industries

A Nylock Nut (also known as a Nylon Insert Lock Nut) is a type of self-locking nut that contains a nylon ring insert at the top of the nut. This nylon insert creates friction against the mating bolt threads, preventing the nut from loosening due to vibration, shock, or movement.

The nylon insert deforms elastically when the bolt is threaded through, ensuring a tight and secure locking action without damaging the bolt threads.

1. Key Features

• Built-in nylon locking insert

• Prevents loosening under vibration

• Reusable (limited number of times)

• Does not require additional locking devices

• Maintains locking torque

Materials

• Stainless steel (A2 - 70 / A4 - 70)

Thread Standards

• Metric (ISO)

2. Usage of Nylock Nut

Nylock nuts are used when:

• Vibration resistance is required

• Fasteners are exposed to dynamic loads

• Space does not allow for lock washers or cotter pins

• A clean, compact locking solution is needed

3. Installation Guidelines

• Installed like a standard nut using hand or power tools

• The nylon insert should engage after full metal thread engagement

• Not recommended for applications exceeding 120°C (250°F), as heat can degrade nylon

• Should not be used on bolts with damaged threads

4. Applications of Nylock Nut

Nylock nuts are widely used across industries where vibration and movement are common.

Automotive

• Engine components (non-high-temperature areas)

• Suspension systems

• Chassis assemblies

Machinery & Equipment

• Motors

• Pumps

• Compressors

• Industrial machinery

Aerospace (Limited Use)

• Non-critical assemblies

• Interior components

Electronics & Electrical

• Control panels

• Mounting brackets

• Enclosures

Construction & Infrastructure

• Steel structures

• Mechanical fittings

• Railings and supports

Home Appliances

• Washing machines

• Air conditioners

• Power tools

 5. Advantages of Nylock Nut

• Excellent vibration resistance

• Eliminates need for lock washers

• Simple and fast installation

• Cost-effective locking solution

• Protects bolt threads from damage

6. Limitations

• Not suitable for high-temperature environments

• Nylon insert can wear after repeated use

• Not recommended for chemical exposure that attacks nylon

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