407842-001 - Tweco SP-2000 Spool Gun Nozzle Body Replacement

Technical Overview of the Tweco 407842-001 Nozzle Body

The Tweco 407842-001 is a specialized nozzle body designed exclusively for the SP-2000 series Spool Guns. As a critical component in the MIG welding torch assembly, this nozzle body serves as the structural interface between the gun tube and the contact tip, while also acting as a gas diffuser to ensure laminar flow of shielding gas around the weld pool.

Manufactured to precise OEM specifications, this component is machined from high-quality brass alloy. Brass is selected for its excellent thermal conductivity and resistance to spatter adhesion, which prolongs the service life of the part in high-heat welding environments. The internal threading is cut to exact tolerances to ensure a secure mechanical and electrical connection with the contact tip, minimizing voltage drop and ensuring consistent arc characteristics.

Proper maintenance of the nozzle body is essential for preventing porosity and irregular bead profiles. A damaged or clogged nozzle body can disrupt gas flow, leading to atmospheric contamination of the weld. This replacement part restores the gun's original functionality, making it an indispensable spare for fabrication shops utilizing the Tweco SP-2000 system for aluminum or mild steel fabrication.

Key Technical Specifications

• Manufacturer: Tweco (ESAB)
• Part Number: 407842-001
• Material: Brass Alloy
• Application: Gas diffusion and tip retention
• Compatibility: Tweco SP-2000 Spool Gun