Tweco 1340-1401 Fine Threaded Nozzle Insulator 2 Pack

Product Description

The TWECO 1340-1401 is a fine threaded nozzle insulator designed for use with Tweco No. 4 MIG guns. It mounts between the nozzle and the gun body to shield the contact tip area from spatter and heat, helping maintain consistent weld quality and extending the service life of the gun. The insulator is sold in a pack of two, making it practical for shop stock or field kits. Welding technicians and fabricators install this part as a routine consumable during MIG gun maintenance. Its fine thread design ensures secure, rattle-free seating during operation.

This insulator is suited for production welding environments and repair shops running Tweco No. 4 MIG guns. It is a direct-fit consumable replacement installed during nozzle changes or whenever the insulator shows signs of heat damage, cracking, or spatter buildup. The two-per-pack quantity supports back-to-back changeouts without downtime waiting on additional parts. It fits standard bench and robotic MIG setups using the compatible Tweco No. 4 platform.

Key Features

• Fine threaded design for secure, stable nozzle seating
• Protects the gun body and contact tip area from spatter and heat damage
• Sold as a 2-pack for convenient stock replenishment
• Compact dimensions support fitment in tight nozzle assemblies
• Direct consumable replacement to maintain weld quality and gun longevity

Compatibility

Compatible with Tweco No. 4 MIG guns as stated by the manufacturer.

Installation Notes

Installation is performed by welding technicians as part of routine MIG gun consumable maintenance. Disconnect the welding machine from its power source before disassembling the gun nozzle assembly. Thread the insulator onto the gun body by hand first to avoid cross-threading, then snug with the appropriate wrench. Inspect the contact tip and diffuser while the nozzle is off and replace any additional worn consumables at the same time.

Technical Specifications

• Thread Type: Fine threaded
• Length: 0.8 inches
• Width: 1.1 inches
• Height: 0.8 inches
• Weight: 0.24 pounds
• Pack Quantity: 2 per pack
• UPC: 608246061658

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1340-1401