The Welding Machine,inverter, cataloged under National Stock Number 3431-01-388-7629, is classified within Federal Supply Class 3431 (Electric Arc Welding Equipment) of the Metalworking Machinery (continued) group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3431-01-388-7629 |
| Item Name | Welding Machine,inverter |
| FSC / FSG | 3431 / 34 — Electric Arc Welding Equipment |
| Status | ACTIVE |
| Supplementary Features | 230/460 VAC; SINGLE OR THREE PHASE, 60 HERTZ; WEIGHT 155 POUNDS; 450 AMPS AT 38 VDC, 60 DUTY CYCLE 3 PHASE INPUT; 275 AMPS AT 31 VDC, 60 DUTY CYCLE SINGLE PHASE INPUT; HEIGHT 15 1/2 IN.; WIDTH 15 1/4 IN.; DEPTH 23 IN. VDC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 31950 | 3/2 Design control — primary reference U.S. Government activity |
| 31950 | 5/9 Secondary reference L-Tec Welding and Cutting Systems |
| SVI 450I CV/CC | 5/1 Secondary reference U.S. Government activity |
| SVI 450I CV/CC | 5/9 Secondary reference L-Tec Welding and Cutting Systems |
| WELDCVC | 5/1 Secondary reference Dla Aviation Engineering Div Department of Defense |
NSN 3431-01-388-7629 is a Welding Machine,inverter, classified under FSC 3431, Electric Arc Welding Equipment. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 6515-01-603-9853, 6625-01-668-5245. Verify interchangeability with system specifications before substitution.
Key specifications for 3431-01-388-7629: Supplementary Features: 230/460 VAC; SINGLE OR THREE PHASE, 60 HERTZ; WEIGHT 155 POUNDS; 450 AMPS AT 38 VDC, 60 DUTY CYCLE 3 PHASE INPUT; 275 AMPS AT 31 VDC, 60 DUTY CYCLE SINGLE PHASE INPUT; HEIGHT 15 1/2 IN.; WIDTH 15 1/4 IN.; DEPTH 23 IN. VDC. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.