Tweco 1350-1400 Nozzle Insulator Coarse Threaded 500A

Product Description

The TWECO 1350-1400 is a coarse-threaded nozzle insulator designed for use with high-amperage MIG welding guns rated up to 500 amps. This insulator fits between the nozzle and the contact tip holder, providing electrical isolation that protects weld quality and extends the service life of the gun. It is a single-piece consumable component sold individually and maintained as a routine replacement item during gun servicing. Licensed welders and fabrication professionals handling Tweco No. 5 and compatible MIG gun platforms will find this part a standard consumable in their maintenance rotation.

This insulator is suited for heavy-duty MIG welding applications where high amperage demands require reliable nozzle isolation. It is commonly installed in industrial and fabrication environments running continuous or semi-automatic wire-feed welding processes. The coarse thread design allows for faster hand-threading during nozzle changes, reducing downtime during consumable swaps. Compatible gun platforms include Tweco No. 5, Tweco 35CT, Tweco 25 Series, and Tweco 25CT MIG guns, as well as Lincoln guns that accept Tweco-style consumables up to 500 amps.

Key Features

• Coarse-threaded design for faster nozzle installation and removal during consumable service
• Rated for use with MIG guns up to 500 amps
• Protects weld quality by providing consistent electrical isolation at the nozzle
• Extends gun service life by shielding the gun body from heat and spatter exposure
• Compact form factor fits standard Tweco-style nozzle assemblies

Compatibility

Compatible with Tweco No. 5 MIG guns, Tweco 35CT, Tweco 25 Series, Tweco 25CT MIG guns, and Lincoln MIG guns accepting Tweco-style consumables rated up to 500 amps.

Installation Notes

Installation should be performed by a qualified welder or welding equipment technician. Disconnect and de-energize the welding power source before servicing any gun consumables. Thread the insulator onto the gun body by hand until snug, then install the nozzle per the gun manufacturer's procedure. Inspect the insulator for cracking, carbon tracking, or spatter buildup during each consumable change and replace as needed to maintain proper isolation.

Technical Specifications

• Thread Type: Coarse threaded
• Maximum Amperage: 500 amps
• Length: 0.8 inches
• Width: 1.1 inches
• Height: 0.8 inches
• Weight: 0.27 pounds
• Unit of Measure: Each
• UPC: 608246062709

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1350-1400