The Flux,soldering, cataloged under National Stock Number 3439-01-554-3435, 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 R & D Metals & Chemicals, Inc Div R & D Metals and Chemicals Inc. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3439-01-554-3435 |
| Primary Part Number | SP44 |
| Item Name | Flux,soldering |
| FSC / FSG | 3439 / 34 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories |
| Manufacturer | R & D Metals & Chemicals, Inc Div R & D Metals and Chemicals Inc |
| Status | ACTIVE |
| Specification/standard Data | QQ-S-571 GOVERNMENT SPECIFICATION |
| Physical Form | PASTE |
| Environmental Protection | CORROSION RESISTANT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| SP44 PRIMARY | R & D Metals & Chemicals, Inc Div R & D Metals and Chemicals Inc (USA) |
| Reference | Meaning |
|---|---|
| SP44 | 3/9 Design control — primary reference Kester Solder Co Div of Litton Industries |
NSN 3439-01-554-3435 is a Flux,soldering, manufactured by R & D Metals & Chemicals, Inc Div R & D Metals and Chemicals Inc, classified under FSC 3439, Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories. Status: active.
NSN 3439-01-554-3435 has 1 manufacturer part number on file: SP44 (R & D Metals & Chemicals, Inc Div R & D Metals and Chemicals Inc).
Key specifications for SP44: Specification/standard Data: QQ-S-571 GOVERNMENT SPECIFICATION; Physical Form: PASTE; Special Features: 57-11-4 STEARIC ACID, PURE 10-25%. 65-85-0 BENZOIC ACID 2.5-10%, 107-21-1 ETHANEDIOL 2.5-10%. PASTE FLUX FOR ELECTRONICS USES. 2 OZ. CAN. OZ; Environmental Protection: CORROSION RESISTANT. 3 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.