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The ITW / Miller 403-12-45-25 is a standard-duty, tapered MIG welding contact tip engineered for 0.045 inch wire diameters, providing electrical conductivity and thermal resistance for industrial MIG welding applications.
Features
High-purity copper construction for minimal electrical resistance
Arc stabilization and spatter reduction
Thermal resistance to prevent burnback
Tapered tip profile for improved weld puddle visibility
Enhanced accessibility for deep V-grooves and tight joints
Bulk packaging for high-volume fabrication environments
Specifications
Manufacturer: Miller Electric (ITW - Illinois Tool Works)
Part Number: 403-12-45-25
Wire Diameter Compatibility: 0.045 in (1.2 mm)
Quantity: 25 per pack
Material Composition: Electrolytic Copper
Profile: Tapered (TPRD)
Duty Cycle Rating: Standard Duty (STD DTY)
Thread Size: Miller M-Series compatible
Orifice Precision: Machined for stable arc transfer
Replacement Cycle: 100 lbs of wire or upon orifice deformation (keyholing)
Applications
Heavy-duty fabrication with high deposition rates
Welding of mild steel, stainless steel, and aluminum alloys
Automotive frame and structural welding
Shipbuilding high-output MIG welding
General manufacturing of heavy machinery and equipment
Structural steel joining and repair
Compatible with Miller M-Series MIG Guns (M-10, M-15, M-25)
Compatible with Miller MDX Series MIG Guns (via adapter)
Compatible with Spoolmatic 15A/30A and XR-Series spool guns
