The Brazing Alloy,aluminum, cataloged under National Stock Number 3439-00-277-6573, 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 6 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 3439-00-277-6573 |
| Item Name | Brazing Alloy,aluminum |
| FSC / FSG | 3439 / 34 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories |
| Status | ACTIVE |
| Flux Feature | NOT INCLUDED |
| Length | 36.000 INCHES NOMINAL IN |
| Diameter | 0.063 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | FS-BA1SI-4 CLASS AND ROD FORM |
| Physical Form | ROD |
| Chemical Composition Percentage | ALUMINUM 85.7; SILICON 12; IRON 0.8; COPPER 0.3; ZINC 0.2; MANGANESE 0.15 MAGNESIUM 0.1; REMAINDER NOT SPECIFIED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| AWS A5.8 | 3/1 Design control — primary reference American Welding Society, Inc. |
| QQB655 | 5/9 Secondary reference U.S. Government activity |
NSN 3439-00-277-6573 is a Brazing Alloy,aluminum, 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): 3439-00-277-6574. Verify interchangeability with system specifications before substitution.
Key specifications for 3439-00-277-6573: Flux Feature: NOT INCLUDED; Length: 36.000 INCHES NOMINAL IN; Diameter: 0.063 INCHES NOMINAL IN; Nondefinitive Spec/std Data: FS-BA1SI-4 CLASS AND ROD FORM. 6 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.