The Brazing Alloy,silver, cataloged under National Stock Number 3439-01-063-7413, is classified within Federal Supply Class 3439 (Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories) of the Metalworking Machinery (continued) group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 7 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 3439-01-063-7413 |
| Primary Part Number | QQ-B-654BCUP-5-1/8X.050INX20L1 |
| Item Name | Brazing Alloy,silver |
| FSC / FSG | 3439 / 34 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Length | 20.000 INCHES NOMINAL IN |
| Criticality Code Justification | ZZZX |
| Departure From Cited Designator | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS |
| Nondefinitive Spec/std Data | 3 GRADE |
| Physical Form | BAR |
| Width | 0.125 INCHES NOMINAL IN |
| Thickness | 0.050 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| QQ-B-654BCUP-5-1/8X.050INX20L1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| QQ-B-654BCUP-5-1/8X.050INX20 | 5/1 Secondary reference U.S. Government activity |
| QQ-B-654 L1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| QQ-B-654 | 4/1 Identification reference U.S. Government activity |
NSN 3439-01-063-7413 is a Brazing Alloy,silver, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 3439, Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories. Status: active.
NSN 3439-01-063-7413 has 1 manufacturer part number on file: QQ-B-654BCUP-5-1/8X.050INX20L1 (Naval Inventory Control Point Mechanicsburg).
3 possible matches (shared part number, not a government interchangeability claim): 3439-01-063-7414, 3439-01-296-5940, 3439-01-302-5443. Verify interchangeability with system specifications before substitution.
Key specifications for QQ-B-654BCUP-5-1/8X.050INX20L1: Length: 20.000 INCHES NOMINAL IN; Criticality Code Justification: ZZZX; Departure From Cited Designator: MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I ITEMS; Nondefinitive Spec/std Data: 3 GRADE. 7 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.