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MIG support

Miller M-25 Gun Parts Lookup

Legacy M-25 gun support page. The M-25 gun family is marked discontinued in this support path; Confirm OEM source details before ordering.

Item number lookup

Parts List

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Item # Part # Description Qty Buy
Gun 169594
Replacement path: MDX-250 -> MDX-250S
gun assembly M-25 Gun Assemblies Legacy gun assembly. Replacement path: M-25 -> MDX-250 -> MDX-250S. Confirm exact replacement configuration before ordering. Replacement: MDX-250, then MDX-250S current replacement chain discontinued
Miller M-25 gun familyReplacement path: MDX-250 -> MDX-250S
Check Price on Amazon
Gun 169596
Replacement path: MDX-250 -> MDX-250S
gun assembly M-25 Gun Assemblies Legacy gun assembly. Replacement path: M-25 -> MDX-250 -> MDX-250S. Confirm exact replacement configuration before ordering. Replacement: MDX-250, then MDX-250S current replacement chain discontinued
Miller M-25 gun familyReplacement path: MDX-250 -> MDX-250S
Buy link unavailable.
Gun 169598
Replacement path: MDX-250 -> MDX-250S
gun assembly M-25 Gun Assemblies Legacy gun assembly. Replacement path: M-25 -> MDX-250 -> MDX-250S. Confirm exact replacement configuration before ordering. Replacement: MDX-250, then MDX-250S current replacement chain discontinued
Miller M-25 gun familyReplacement path: MDX-250 -> MDX-250S
Check Price on Amazon
Gun 169599
Replacement path: MDX-250 -> MDX-250S
gun assembly M-25 Gun Assemblies Legacy gun assembly. Replacement path: M-25 -> MDX-250 -> MDX-250S. Confirm exact replacement configuration before ordering. Replacement: MDX-250, then MDX-250S current replacement chain discontinued
Miller M-25 gun familyReplacement path: MDX-250 -> MDX-250S
Check Price on Amazon
1 169724
Nozzle, Slip Type, .500, (12.7 mm) Opening, .125 Tip Recess
nozzle M-25 Nozzles Bore / opening: .500 nozzle bore/opening; not wire size. Nozzle opening is not the welding wire diameter.
Miller M-25 gun family
Check Price on Amazon
1 169725
Nozzle, Slip Type, .625, (15.9 mm) Opening, .125 Tip Recess
nozzle M-25 Nozzles Bore / opening: .625 nozzle bore/opening; not wire size. Nozzle opening is not the welding wire diameter.
Miller M-25 gun family
Buy link unavailable.
1 200258
Nozzle, Slip Type, .500, (12.7 mm) Opening, Flush Tip
nozzle M-25 Nozzles Bore / opening: .500 nozzle bore/opening; not wire size. Nozzle opening is not the welding wire diameter.
Miller M-25 gun family
Check Price on Amazon
1 169726
Nozzle, Slip Type, .625, (15.9 mm) Opening, Flush Tip
nozzle M-25 Nozzles Bore / opening: .625 nozzle bore/opening; not wire size. Nozzle opening is not the welding wire diameter.
Miller M-25 gun family
Check Price on Amazon
1 169727
Nozzle, Slip Type, .625, (15.9 mm) Opening, .125 Tip Stickout
nozzle M-25 Nozzles Bore / opening: .625 nozzle bore/opening; not wire size. Nozzle opening is not the welding wire diameter.
Miller M-25 gun family
Buy link unavailable.
2 087299
.023 (.6 mm) Contact Tip, Screw Type - 1.125"
contact tip M-25 Contact Tips Wire size: .023 (.6 mm)
Miller M-25 gun family
Check Price on Amazon
2 000067
.030 (.8 mm) Contact Tip, Screw Type - 1.125"
contact tip M-25 Contact Tips Wire size: .030 (.8 mm)
Miller M-25 gun family
Check Price on Amazon
2 000068
.035 (.9 mm) Contact Tip, Screw Type - 1.125"
contact tip M-25 Contact Tips Wire size: .035 (.9 mm)
Miller M-25 gun family
Check Price on Amazon
2 000069
.045 (1.2 mm) Contact Tip, Screw Type - 1.125"
contact tip M-25 Contact Tips Wire size: .045 (1.2 mm)
Miller M-25 gun family
Check Price on Amazon
2 172034
3/64 (1.19 mm) Contact Tip, Screw Type - 1.125"
contact tip M-25 Contact Tips Wire size: 3/64 (1.19 mm)
Miller M-25 gun family
Check Price on Amazon
3 169728
Contact Tip Adapter - Gas Diffuser
diffuser M-25 Front-End Parts
Miller M-25 gun family
Check Price on Amazon
4 169729
Nozzle Adapter
diffuser M-25 Front-End Parts
Miller M-25 gun family
Check Price on Amazon
5 170468
O-Ring
o-ring M-25 Front-End Parts
Miller M-25 gun family
Buy link unavailable.
6 169730
Shock Washer
replacement part M-25 Replacement Parts
Miller M-25 gun family
Check Price on Amazon
7 169731
Tube Head - Gooseneck
gooseneck M-25 Replacement Parts
Miller M-25 gun family
Check Price on Amazon
8 169738
Handle Locking Nut
handle M-25 Replacement Parts
Miller M-25 gun family
Check Price on Amazon
9 169732
Jam Nut
retaining hardware M-25 Front-End Parts
Miller M-25 gun family
Buy link unavailable.
10 169737
Front End Handle
handle M-25 Replacement Parts
Miller M-25 gun family
Check Price on Amazon
11 227799
Rear End Handle
handle M-25 Replacement Parts
Miller M-25 gun family
Buy link unavailable.
12 227800
Replacement Trigger Cord
trigger M-25 Replacement Parts
Miller M-25 gun family
Buy link unavailable.
13 209495
Miller Type Power Pin - Feeder Connector
connector M-25 Replacement Parts
Miller M-25 gun family
Buy link unavailable.
14 079974
O-ring, .500 ID x .103CS rbr
o-ring M-25 Front-End Parts
Miller M-25 gun family
Check Price on Amazon
15 194010
.023-.025 (.6 mm) Wire Size x 15' Length
liner M-25 Liners Wire size: .023-.025 (.6 mm)
Miller M-25 gun family
Check Price on Amazon
15 194011
.030-.035 (.8-.9 mm) Wire Size x 15' Length
liner M-25 Liners Wire size: .030-.035 (.8-.9 mm)
Miller M-25 gun family
Check Price on Amazon
15 194012
.035-.045 (.9-1.2 mm) Wire Size x 15' Length
liner M-25 Liners Wire size: .035-.045 (.9-1.2 mm)
Miller M-25 gun family
Check Price on Amazon
15 194014
3/64 (1.19 mm) Aluminum Wire Size x 15' Length (Teflon Innercore)
liner M-25 Liners Wire size: 3/64 (1.19 mm)
Miller M-25 gun family
Buy link unavailable.
16 079975
O-Ring .187 ID x .103CS rbr
o-ring M-25 Front-End Parts
Miller M-25 gun family
Check Price on Amazon
17 227798
Replacement Trigger *** Discontinued ***
trigger M-25 Replacement Parts discontinued
Miller M-25 gun family
Check Price on Amazon
17 196255
Replacement Trigger
trigger M-25 Replacement Parts
Miller M-25 gun family
Check Price on Amazon
18 2520033
Rear Cable Strain Relief
cable support M-25 Replacement Parts
Miller M-25 gun family
Buy link unavailable.
19 2280056
Screw
retaining hardware M-25 Front-End Parts
Miller M-25 gun family
Buy link unavailable.
20 169746
Terminal
terminal M-25 Replacement Parts
Miller M-25 gun family
Buy link unavailable.

Related consumables

Miller MDX-250 / MDX-250S Replacement Chain

Replacement path for the discontinued M-25. Consumable continuity is not assumed unless the fit is confirmed.

Open MDX-250 page

Ecosystem lifecycle

Replacement Chain

Legacy Generation 1 Partial Compatibility

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

Legacy ecosystem. Use the replacement path as upgrade guidance only after confirming the current replacement information.

  1. M-25

    Legacy/discontinued M-25 gun ecosystem.

    Generation 1 Legacy
  2. MDX-250

    Replacement generation after M-25.

    Generation 2 Superseded
  3. MDX-250S

    Current supported replacement generation for the M-25 lineage.

    Generation 3 Current
Consumables still compatible?

Do not carry consumable compatibility forward automatically. Confirm exact consumables, gun configuration, and machine fit before ordering.

do not assume

Upgrade Guidance

  • Keep replacement history visible so older indexed pages still help users.
  • Treat the current replacement as a navigation path, not an automatic compatibility claim.
  • Only treat consumables as interchangeable when the OEM catalog or manual confirms it.

Troubleshooting relationships

Symptoms Connected to Parts

Poor Wire Feed

Wire speed feels inconsistent or wire drag increases through the gun.

Use this as a fitment check path. Confirm against OEM service documentation before ordering.

Front-End Heat or Spatter Buildup

Nozzle heat or spatter buildup appears around the gun front end.

Nozzle bore and diffuser/front-end fitment should be together.

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.

Related Consumables

Nozzles

Related Support

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