Tweco 1240-1897 Flux Cored Welding Nozzle 3/8 Inch Bore

Product Description

The TWECO 1240-1897 is a flux cored MIG welding nozzle designed for use with the Tweco Velocity consumable system. It features a 3/8 inch bore and is rated for 200 to 350 amps at 60 percent duty cycle. The Velocity design reduces the number of threaded connections to a single set, pairing brass threads on the nozzle with heat-treated stainless steel threads on the gooseneck. This soft-against-hard thread pairing resists seizing and cross-threading. The nozzle is a replaceable component installed by welders and fabricators working with flux cored wire processes.

This nozzle fits the Tweco Velocity MIG gun system and is optimized for flux cored wire applications running .045 inches (1.2 mm) wire, with compatibility spanning wire sizes from .030 inches (0.8 mm) to 1/16 inches (1.6 mm). It is suited for production and fabrication environments where cycle times are high and quick nozzle changes without tools reduce downtime. The tool-free design is particularly useful in shop settings where stopping to locate a wrench interrupts workflow.

Key Features

• Rated 200 to 350 amps at 60 percent duty cycle for heavy-duty flux cored applications
• 3/8 inch bore diameter optimized for .045 inch (1.2 mm) flux cored wire
• Compatible with wire sizes from .030 inches (0.8 mm) to 1/16 inches (1.6 mm)
• Single-thread Velocity design eliminates tool requirements for nozzle changes
• Brass nozzle threads mate with heat-treated stainless steel gooseneck threads to resist seizing and cross-threading

Compatibility

Designed for use with the Tweco Velocity MIG gun consumable system for flux cored wire welding processes.

Installation Notes

Installation and replacement are performed by the welding operator or maintenance technician. Always power down the welding machine and allow the gun and nozzle to cool completely before handling consumables. The Velocity system is designed for tool-free nozzle replacement — do not use pliers or wrenches on the nozzle threads, as this can damage the brass threading. Inspect gooseneck threads periodically for wear or spatter buildup and clean as needed before installing a replacement nozzle.

Technical Specifications

• Bore Diameter: 3/8 inch
• Amperage Range: 200-350 amps
• Duty Cycle: 60 percent
• Wire Size Range: .030 inches (0.8 mm) to 1/16 inches (1.6 mm)
• Optimized Wire Size: .045 inches (1.2 mm)
• Height: 2.25 inches
• Width: 1 inch
• Length: 1 inch
• Weight: 0.19 pounds
• Sold As: Each

Standard Information

• Brand: TWECO
• Manufacturer Part Number: 1240-1897