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Copper MIG welding nozzle, conical shape, slip-on connection, self-insulated finish

Miller Enterprises

Miller Enterprises 169594 Nozzle 5/8 1/8 Recess hand tool

SKU CH-D3X7-3HAEJ MPN 169594

Copper MIG welding nozzle with 5/8 inch bore and 1/8 inch tip recess for standard-duty applications

  • TypeAngle, Pitch & Slope Locators
  • Compatible with Miller M-Series welders for reliable MIG performance
  • 5/8 inch bore diameter suits standard MIG welding applications
  • 1/8 inch recess positions the tip for consistent gas coverage
  • Copper construction provides good thermal conductivity and durability
  • Self-insulated design simplifies setup and reduces spatter adhesion

MIG welding nozzle for M-Series guns

This copper conical nozzle fits Miller and Hobart M-Series MIG guns including models 169594, 169596, 169598, 169599 and 239173. It has a 5/8 inch bore and a 1/8 inch tip recess for standard-duty MIG welding applications.

Self-insulated design with slip-on connection

The self-insulated construction removes the need for a separate insulator piece during assembly. A slip-on connection allows quick nozzle changes without tools, while the compatible gas diffuser 169728 and M-Series contact tips complete the consumable set.

Direct slip-on installation on M-Series guns

Installation is a simple push-on action onto the gas diffuser 169728 fitted to the M-Series gun. The most common issue is selecting a nozzle with the wrong bore size or recess dimension for the chosen contact tip and wire diameter, which can affect gas coverage and tip life.

Highlights

  • Compatible with Miller M-Series welders for reliable MIG performance
  • 5/8 inch bore diameter suits standard MIG welding applications
  • 1/8 inch recess positions the tip for consistent gas coverage
  • Copper construction provides good thermal conductivity and durability
  • Self-insulated design simplifies setup and reduces spatter adhesion

Specifications

BrandMILLER ELECTRIC
TypeAngle, Pitch & Slope Locators

Questions about this item

How often should the copper conical nozzle 169725 be replaced during standard-duty MIG welding?

Replace the nozzle when the 5/8 in bore shows erosion or the 1/8 in recess no longer seats the contact tip cleanly; inspection every few shifts is typical for standard duty.

What wear sign appears first on the self-insulated nozzle during continuous MIG runs?

The copper bore tends to ovalise before the insulation degrades, so watch for irregular gas coverage as the early indicator.

Does the slip-on nozzle 169725 run hotter than thread-on styles during all-day welding?

Slip-on fit conducts heat similarly to thread-on; the copper body and self-insulated design keep temperature rise comparable for standard-duty cycles.

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