The Holder,pack,heliweld, cataloged under National Stock Number 3431-00-654-8403, is classified within Federal Supply Class 3431 (Electric Arc Welding Equipment) of the Metalworking Machinery (continued) group. The manufacturer of record is Messer Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3431-00-654-8403 |
| Primary Part Number | H20A |
| Item Name | Holder,pack,heliweld |
| FSC / FSG | 3431 / 34 — Electric Arc Welding Equipment |
| Manufacturer | Messer Llc |
| Status | ACTIVE |
| General Characteristics Item Description | 200 AMP |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 3431-00-654-8403 is a Holder,pack,heliweld, manufactured by Messer Llc, classified under FSC 3431, Electric Arc Welding Equipment. Status: active.
NSN 3431-00-654-8403 has 2 manufacturer part numbers on file: H20A (Audion Elektro B.v.), H20A (Messer Llc).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-619-7060. Verify interchangeability with system specifications before substitution.
Key specifications for H20A: General Characteristics Item Description: 200 AMP; End Item Identification: AIRCO MODEL TIG WELDERS. 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.