E-z Lok 329-601 Self-lock Thread Insert 3/8-16

Product Description

The E-Z LOK 329-601 is a self-locking threaded insert designed to create a strong, permanent internal thread in a pre-tapped hole. Manufactured from carbon steel with a zinc phosphate coating, this standard-wall insert accepts a 3/8 in-16 internal thread while its 9/16 in-12 external thread anchors securely into the parent material. At 1 inch in length, it delivers a tensile strength of 60,200 pounds, making it well suited for high-load fastening applications. Installation requires the compatible E-Z LOK 500-5 installation tool. This insert is not passivated and is intended for use in coarse-thread standard-tap applications.

The 329-601 is used in applications where threads in softer base materials need to be reinforced or where worn, stripped, or damaged threads require restoration. Standard-wall construction makes it appropriate for general industrial, maintenance, and repair scenarios where hole diameter and wall thickness allow for the 9/16 in-12 external thread profile. It is installed by machinists, millwrights, maintenance technicians, and assembly professionals working across metal fabrication and industrial equipment repair environments.

Key Features

• Self-locking standard-wall design resists loosening under vibration and dynamic loads
• 3/8 in-16 internal thread accepts standard coarse-thread fasteners
• 9/16 in-12 external thread for secure engagement in the tapped parent material
• 60,200 pound tensile strength for high-load fastening reliability
• Zinc phosphate coating provides corrosion resistance and improved adhesion
• Compatible with E-Z LOK 500-5 installation tool for consistent, repeatable installs

Compatibility

Designed for use with standard coarse-thread taps and compatible with the E-Z LOK 500-5 installation tool. Suitable as an OEM-style thread repair or reinforcement insert in carbon steel or similarly machinable parent materials.

Installation Notes

Installation should be performed by a qualified technician familiar with thread insert procedures. The parent material must be tapped to the correct 9/16 in-12 specification before insert installation. Use the designated E-Z LOK 500-5 installation tool to drive the insert to proper depth and avoid thread damage. Ensure the work piece is secured and free of chips or debris prior to installation.