Dorman 814-046: Hex Lock Nut With Nylon Insert

Introduction

This manual provides essential information for the proper use, installation, and maintenance of the Dorman 814-046 Hex Lock Nut with Nylon Insert. Please read this manual thoroughly before installation to ensure safe and effective application.

The Dorman 814-046 is a Grade 2 hex lock nut featuring a nylon insert, designed for secure fastening applications with a 5/8-18 thread size. It serves as a direct replacement for original parts, ensuring reliable performance and long service life.

Product Overview

Key Features

• Direct replacement: Engineered to match the fit, function, and appearance of the original equipment part.
• Ideal solution: Provides a reliable replacement for missing or worn original components.
• Durable construction: Manufactured from quality materials to ensure reliable performance and extended service life.
• Nylon insert: Features an integrated nylon insert for enhanced locking capability, preventing loosening due to vibration.
• Trustworthy quality: Backed by Dorman's extensive automotive experience and product expertise.

Components Included

The Dorman 814-046 package contains:

• One (1) Dorman 814-046 Hex Lock Nut With Nylon Insert - Grade 2 - Thread Size 5/8-18

Image: Front view of the Dorman 814-046 Hex Lock Nut, showing its hexagonal shape and the internal nylon locking ring.

Setup and Installation

Proper installation is crucial for the performance and safety of the Dorman 814-046 Hex Lock Nut. Always refer to the vehicle or component manufacturer's service manual for specific torque specifications and procedures.

1. Preparation: Ensure that the mating bolt or stud has a 5/8-18 thread size and is clean and free of debris, rust, or damaged threads.
2. Positioning: Place the component to be fastened onto the bolt or stud.
3. Initial Threading: Hand-thread the Dorman 814-046 Hex Lock Nut onto the bolt or stud until the nylon insert engages with the threads. This will require slightly more effort than a standard nut.
4. Torquing: Using an appropriate wrench or socket, tighten the nut to the manufacturer's specified torque. The nylon insert creates friction against the bolt threads, providing resistance to loosening from vibration and preventing the nut from backing off.
5. Verification: After torquing, visually inspect the installation to ensure the nut is fully seated and the component is securely fastened.

Note: Do not reuse nylon insert lock nuts if they have been removed, as the nylon insert's locking effectiveness may be compromised after initial use. Always use a new lock nut for critical applications.

Operating Principle

The Dorman 814-046 is a prevailing torque type lock nut. Its primary function is to resist loosening when subjected to vibration, thermal expansion, or other dynamic forces. This is achieved by the integrated nylon (polymer) insert located at the top of the nut.

When the nut is threaded onto a bolt, the bolt's threads deform the nylon insert. This deformation creates a tight, frictional interference fit between the nut and the bolt, which significantly increases the torque required to loosen the nut compared to a standard nut. This self-locking feature ensures that the fastener remains secure in its application, even under demanding conditions.

Maintenance

The Dorman 814-046 Hex Lock Nut is designed for long-term, maintenance-free operation once properly installed. Regular maintenance primarily involves periodic inspection of the fastened assembly.

• Visual Inspection: Periodically inspect the nut and the surrounding components for any signs of loosening, corrosion, or damage.
• Torque Check: If the application is critical or subject to extreme conditions, a periodic torque check may be advisable, following the manufacturer's guidelines. However, overtightening or repeated loosening/tightening can degrade the nylon insert's effectiveness.
• Replacement: If the nut shows signs of damage, corrosion, or if it has been removed, it should be replaced with a new Dorman 814-046 lock nut to ensure continued secure fastening.

Troubleshooting

While the Dorman 814-046 Hex Lock Nut is a straightforward component, issues can arise from improper installation or application.

Specifications

Warranty Information

Specific warranty details for the Dorman 814-046 Hex Lock Nut are provided by Dorman Products. For comprehensive warranty information, including terms, conditions, and claim procedures, please refer to the official Dorman Products website or contact their customer support directly.

Dorman Products typically offers warranties against defects in material and workmanship for a specified period. Keep your purchase receipt as proof of purchase.

Support and Contact

For further assistance, technical support, or inquiries regarding the Dorman 814-046 Hex Lock Nut, please contact Dorman Products directly.

• Official Website: Visit the Dorman Store on Amazon or the main Dorman Products website for product information, FAQs, and contact details.
• Customer Service: Refer to the Dorman Products website for current customer service contact methods, including phone numbers and email support.

When contacting support, please have the model number (814-046) and any relevant purchase information ready.