The Flux,soldering, cataloged under National Stock Number 3439-01-565-0107, 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 Kester Solder Co Div of Litton Industries. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3439-01-565-0107 |
| Primary Part Number | 63-20025-0186 |
| Item Name | Flux,soldering |
| FSC / FSG | 3439 / 34 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories |
| Manufacturer | Kester Solder Co Div of Litton Industries |
| Status | ACTIVE |
| Supplementary Features | SELF LIFE 2 YEARS AT 55-70 DEGREE F; FLAMABLE; ROSIN FLUX |
| Physical Form | LIQUID |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 63-20025-0186 PRIMARY | Kester Solder Co Div of Litton Industries (USA) |
| Reference | Meaning |
|---|---|
| 186 25 LITER | 5/9 Secondary reference Kester Solder Co Div of Litton Industries |
NSN 3439-01-565-0107 is a Flux,soldering, manufactured by Kester Solder Co Div of Litton Industries, classified under FSC 3439, Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories. Status: active.
NSN 3439-01-565-0107 has 1 manufacturer part number on file: 63-20025-0186 (Kester Solder Co Div of Litton Industries).
Key specifications for 63-20025-0186: Supplementary Features: SELF LIFE 2 YEARS AT 55-70 DEGREE F; FLAMABLE; ROSIN FLUX; Physical Form: LIQUID; Special Features: USED ON CIRCUIT BOARDS; 25 PER CENT SOLIDS; SPECIFIC GRAVITY 0.848 PLUS OR MINUS 0.005; Part Name Assigned by Controlling Agency: ROSIN LIQUID FLUX. 2 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.