The Solder,lead-Tin Alloy, cataloged under National Stock Number 3439-01-020-0040, 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6 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3439-01-020-0040 |
| Item Name | Solder,lead-Tin Alloy |
| FSC / FSG | 3439 / 34 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories |
| Status | ACTIVE |
| Wire Core Type | SOLID |
| Diameter | 0.062 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | SN50 COMPOSITION AND W FORM AND S TYPE |
| Content Within Each Unit Package | 1 LB LBS |
| Physical Form | WIRE |
| Chemical Composition Percentage | LEAD 50,TIN 50 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| QQ-S-571 | 4/1 Identification reference U.S. Government activity |
| KESTER44-062 | 3/9 Design control — primary reference Kester Solder Co Div of Litton Systems Inc |
NSN 3439-01-020-0040 is a Solder,lead-Tin Alloy, classified under FSC 3439, Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories. Status: active.
Key specifications for 3439-01-020-0040: Wire Core Type: SOLID; Diameter: 0.062 INCHES NOMINAL IN; Nondefinitive Spec/std Data: SN50 COMPOSITION AND W FORM AND S TYPE; Content Within Each Unit Package: 1 LB LBS. 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.