The Brazing Alloy,aluminum, cataloged under National Stock Number 3439-00-277-6572, 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6 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 3439-00-277-6572 |
| 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 | 0.125 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | FS-BALSI-4 CLASS AND ROD FORM |
| Physical Form | ROD |
| Chemical Composition Percentage | ALUMINUM 85.25; SILICON 13; IRON 0.8,COPPER 0.3; ZINC 0.2; MANGANESE 0.15; OTHER 0.15; MAGNESIUM 0.1 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| QQB655 | 4/1 Identification reference U.S. Government activity |
NSN 3439-00-277-6572 is a Brazing Alloy,aluminum, classified under FSC 3439, Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 3439-00-277-6573, 3439-00-277-6574. Verify interchangeability with system specifications before substitution.
Key specifications for 3439-00-277-6572: Flux Feature: NOT INCLUDED; Length: 36.000 INCHES NOMINAL IN; Diameter: 0.125 INCHES NOMINAL IN; Nondefinitive Spec/std Data: FS-BALSI-4 CLASS AND ROD FORM. 6 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.