Weldmark by Tweco MIG Nozzle has a Bore Size of 1/2" for 400Amp MIG Gun

Weldmark® by Tweco® Short Stop Copper Nozzle with 1/2" bore size is designed for standard gas diffuser and is used with up to 450 A Tweco® No. 4 MIG guns. 3.48" Nozzle with 0.875" OD is ideal for use in medium to heavy duty welding application up to 450 A. It features part number rolled stamped on the outer surface for easy identification. It is adjustable and is made of 122 DHP copper alloy. Nozzle with recess contact tip relationship 0.125 - 0.156" is best suited for higher heat applications requiring longer electrical stick-out or in cases where the nozzle touches the work piece. It is sold as 2 per pack.

• Easy identification - part no rolled stamped on the outside surface
• Nozzle housing - cut and formed from 122 dhp copper alloy tubing
• Nozzle housing - cut and formed from 122 dhp copper alloy tubing
• Flush Tips are generally used where a shorter electrical stick-out is used sometimes resulting in shorter/tighter arc lengths, This brings the tip closer to the work piece
• Flush Tips are generally used where a shorter electrical stick-out is used sometimes resulting in shorter/tighter arc lengths, This brings the tip closer to the work piece
• Protruding Tips are generally used when welding open root pipe or any joint that requires the welder to get into a tight weld joint. However the down side to this is the chance of arcing the tip to the work piece, which could damage front end parts resulting in downtime needed to replace