MIG support

Miller MDX-250 Parts Lookup

Use this MDX-250 page to match the gun stock number, front-end consumable family, contact tips, nozzles, diffusers, liners, and kit rows before ordering.

Item number lookup

Parts List

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Item # Part # Description Qty Buy
Gun 1770035
MDX-250, 10 ft. (3 m), 250 A, 100% with CO2 gas, 60% with mixed gas
gun assembly MDX-250 gun models Wire size: .030 - .035 in. (0.8 - 0.9 mm) Consumable path: Standard duty.
1 View on Amazon
Gun 1770037
MDX-250, 15 ft. (4.6 m), 250 A, 100% with CO2 gas, 60% with mixed gas
gun assembly MDX-250 gun models Wire size: .030 - .035 in. (0.8 - 0.9 mm) Consumable path: Standard duty.
1 View on Amazon
Gun 1770038
MDX-250, 15 ft. (4.6 m), 250 A, 100% with CO2 gas, 60% with mixed gas
gun assembly MDX-250 gun models Wire size: .035 - .045 in. (0.9 - 1.2 mm) Consumable path: Standard duty.
1 View on Amazon
Gun 1770043
MDX-250, 15 ft. (4.6 m), 250 A, 100% with CO2 gas, 60% with mixed gas
gun assembly MDX-250 gun models Wire size: .035 - .045 in. (0.9 - 1.2 mm) Consumable path: Heavy duty.
1 N/A
1 N-M1200C
1/2 in. ID flush copper nozzle, standard duty
nozzle MDX-250 consumables and replacement parts
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1 N-M1218C
1/2 in. ID, 1/8 in. recess copper nozzle, standard duty
nozzle MDX-250 consumables and replacement parts
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1 N-M5800C
5/8 in. ID flush copper nozzle, standard duty
nozzle MDX-250 consumables and replacement parts
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1 N-M5818C
5/8 in. ID, 1/8 in. recess copper nozzle, standard duty
nozzle MDX-250 consumables and replacement parts
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1 N-M58XTC
5/8 in. ID, 1/8 in. extension copper nozzle, standard duty
nozzle MDX-250 consumables and replacement parts
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3 D-M250
MDX-250 standard-duty diffuser
diffuser MDX-250 consumables and replacement parts
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3 D-MA250M
MDX-250 heavy-duty diffuser
diffuser MDX-250 consumables and replacement parts
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2 T-M030
.030 in. MDX standard-duty contact tip
contact tip MDX-250 consumables and replacement parts
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2 T-M035
.035 in. MDX standard-duty contact tip
contact tip MDX-250 consumables and replacement parts
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2 T-M045
.045 in. MDX standard-duty contact tip
contact tip MDX-250 consumables and replacement parts
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2 T-A035CHM
.035 in. MDX heavy-duty contact tip
contact tip MDX-250 consumables and replacement parts
N/A
2 T-A045CHM
.045 in. MDX heavy-duty contact tip
contact tip MDX-250 consumables and replacement parts
N/A
4 LM1A-15
15 ft. MDX liner, .023-.025 in. wire
liner MDX-250 consumables and replacement parts
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4 LMD2A-15
15 ft. MDX liner, .030-.035 in. wire
liner MDX-250 consumables and replacement parts
Amazon link: Needs verification.
4 LMD3A-15
15 ft. MDX liner, .035-.045 in. wire
liner MDX-250 consumables and replacement parts
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Kit 1880275
MDX-250 consumable kit, .030 in. wire
consumable kit MDX-250 consumables and replacement parts
N/A
Kit 1880276
MDX-250 consumable kit, .035 in. wire
consumable kit MDX-250 consumables and replacement parts
N/A
Kit 1880277
MDX-250 consumable kit, .045 in. wire
consumable kit MDX-250 consumables and replacement parts
N/A
Kit 1880278
MDX-250 heavy-duty consumable kit, .035 in. wire
consumable kit MDX-250 consumables and replacement parts
N/A
Kit 1880279
MDX-250 heavy-duty consumable kit, .045 in. wire
consumable kit MDX-250 consumables and replacement parts
N/A

Related consumables

Miller M-25 Gun

Legacy 250-amp gun family before the MDX-250 replacement path.

Open support page

MDX-250S AccuLock S

Current AccuLock S support path in the MDX-250 lineage.

Open support page

Ecosystem lifecycle

Replacement Chain

Replacement Generation Generation 2

M-25 -> MDX-250 -> MDX-250S

  1. M-25

    Legacy 250-amp Miller gun family.

    Generation 1 Legacy
  2. MDX-250

    Replacement generation after M-25.

    Generation 2 Current Support
  3. MDX-250S

    Current MDX-250S / AccuLock S support path.

    Generation 3 Current Replacement Path
Consumable continuity

Do not assume standard MDX, AccuLock S, and legacy M-25 consumables interchange. Match the gun model, stock number, and consumable family before ordering.

do not assume Model Specific

Upgrade Guidance

  • Use the replacement chain for navigation and upgrade planning.
  • Confirm the exact gun stock number and consumable family before ordering replacement parts.

MIG Fitment Check

Match the part number, machine model, gun or torch family, package quantity, and generation before buying. Amazon links are convenience links only, not compatibility proof.