MIG support

Miller MDX-250S AccuLock S Parts Lookup

Use this MDX-250S / AccuLock S page for the heavy-duty AccuLock S consumable path. Match the stock number, contact tip, nozzle, and diffuser family before ordering.

Item number lookup

Parts List

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Item # Part # Description Qty Buy
Gun 1770041
MDX-250 AccuLock S, 10 ft. (3 m), 250 A
gun assembly MDX-250 AccuLock S gun models Wire size: .035 - .045 in. (0.9 - 1.2 mm) Consumable path: AccuLock S.
1 N/A
Gun 1770042
MDX-250 AccuLock S, 12 ft. (3.7 m), 250 A
gun assembly MDX-250 AccuLock S gun models Wire size: .035 - .045 in. (0.9 - 1.2 mm) Consumable path: AccuLock S.
1 Amazon link: Needs verification.
Gun 1770043
MDX-250 AccuLock S, 15 ft. (4.6 m), 250 A
gun assembly MDX-250 AccuLock S gun models Wire size: .035 - .045 in. (0.9 - 1.2 mm) Consumable path: AccuLock S / heavy duty.
1 N/A
1 N-A5800CM
5/8 in. ID flush heavy-duty copper nozzle
nozzle MDX-250 AccuLock S consumables and replacement parts
View on Amazon
1 N-A5818CM
5/8 in. ID, 1/8 in. recess heavy-duty copper nozzle
nozzle MDX-250 AccuLock S consumables and replacement parts
N/A
2 T-A035CH
.035 in. AccuLock S contact tip
contact tip MDX-250 AccuLock S consumables and replacement parts
View on Amazon
2 T-A045CH
.045 in. AccuLock S contact tip
contact tip MDX-250 AccuLock S consumables and replacement parts
View on Amazon
3 D-MA250M
MDX-250 heavy-duty diffuser
diffuser MDX-250 AccuLock S consumables and replacement parts
View on Amazon

Related consumables

Ecosystem lifecycle

Replacement Chain

Current Generation 3

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 Replacement Generation
  3. MDX-250S

    Current MDX-250S / AccuLock S support path.

    Generation 3 Current
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.