The Flux,soldering, cataloged under National Stock Number 3439-01-373-8475, is classified within Federal Supply Class 3439 (Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories) of the Metalworking Machinery (continued) group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3439-01-373-8475 |
| Item Name | Flux,soldering |
| FSC / FSG | 3439 / 34 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories |
| Status | ACTIVE |
| Content Within Each Unit Package | 8 OZ OZ |
| Physical Form | PASTE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| B32-94 | 5/9 Secondary reference U.S. Government activity |
| MIL-F-14256-RMA | 5/9 Secondary reference U.S. Government activity |
| ASTM B32 | 3/1 Design control — primary reference U.S. Government activity |
NSN 3439-01-373-8475 is a Flux,soldering, classified under FSC 3439, Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3439-01-541-8681. Verify interchangeability with system specifications before substitution.
Key specifications for 3439-01-373-8475: Content Within Each Unit Package: 8 OZ OZ; Physical Form: PASTE; Special Features: THE FLUX SHALL BE COMPOSED OF GUM ROSIN,WOOD ROSIN OR TALL OIL ROSIN HAVING A MINIMUM ACID VALUE OF 130 DISSOLVED IN,OR PLASTICIZED BY,A NONHALOGENATED SOLVENT; ROSIN MILDLY ACTIVATATED. 2 specifications are documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). 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.