Tweco 1340-1100 Nozzle Insulator 400A Mig Gun

Product Description

The TWECO 1340-1100 is a slip-on nozzle insulator designed for use with Tweco No. 4 MIG welding guns rated up to 400 amps. This consumable component fits between the nozzle and the gun body, providing electrical isolation and protecting the contact tip holder from spatter and heat damage. Proper insulator condition is critical to maintaining arc stability and preventing short circuits caused by conductive spatter bridging internal gun components. Licensed welders, fabricators, and MIG welding technicians install this part as a routine consumable replacement during gun maintenance cycles.

This insulator is suited for MIG welding applications where Tweco No. 4 style guns are in service. Its slip-on design allows fast field replacement without special tooling, making it practical for production welding environments and service shops alike. It is sold individually as a single unit; minimum order quantity is 25 pieces, making it appropriate for stocking as a shop consumable.

Key Features

• Slip-on design allows quick replacement during routine gun maintenance
• Compatible with Tweco No. 4 MIG guns rated up to 400 amps
• Provides electrical isolation between nozzle and gun body
• Protects internal gun components from spatter accumulation
• Sold in minimum quantities of 25 — suitable for shop stocking

Compatibility

Compatible with Tweco No. 4 MIG guns rated up to 400 amps. Designed as an OEM-style slip-on replacement insulator for Tweco Model 34A applications.

Installation Notes

This insulator is replaced by welding technicians during standard MIG gun consumable maintenance. Disconnect the gun from the wire feeder and ensure the power source is off before servicing any gun components. Slide the worn insulator off the contact tip holder and press the replacement insulator firmly into its seated position before reinstalling the nozzle. Inspect mating surfaces for spatter buildup and clear before assembly to ensure a proper fit.

Technical Specifications

• Current Rating: 400 amps maximum
• Length: 0.8 inches
• Width: 1.1 inches
• Height: 0.8 inches
• Weight: 0.02 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 25

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1340-1100