The Welding Machine,arc, cataloged under National Stock Number 3431-00-421-0543, 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1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3431-00-421-0543 |
| Item Name | Welding Machine,arc |
| FSC / FSG | 3431 / 34 — Electric Arc Welding Equipment |
| Status | ACTIVE |
| Reference Number Differentiating Characteristics | AUTOMATIC,TUBE WELD TYPE,PORTABLE,1/4 IN. OD MIN TO 3 IN. OD MAX TUBE WELD CAPACITY,25 KVA,230/460V,60 HZ,3 PHASE INPUT POWER,5 TO 300 AMP OUTPUT CURRENT RANGE V |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Reference | Meaning |
|---|---|
| 3431-5511-3000 | 6/9 Informative reference only U.S. Government activity |
| V3PWDI40 | 3/1 Design control — primary reference Astro-Arc Co |
NSN 3431-00-421-0543 is a Welding Machine,arc, classified under FSC 3431, Electric Arc Welding Equipment. Status: active.
Key specifications for 3431-00-421-0543: Reference Number Differentiating Characteristics: AUTOMATIC,TUBE WELD TYPE,PORTABLE,1/4 IN. OD MIN TO 3 IN. OD MAX TUBE WELD CAPACITY,25 KVA,230/460V,60 HZ,3 PHASE INPUT POWER,5 TO 300 AMP OUTPUT CURRENT RANGE V. 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.