The Solder,lead-Tin Alloy, cataloged under National Stock Number 3439-01-371-6859, 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6 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3439-01-371-6859 |
| Item Name | Solder,lead-Tin Alloy |
| FSC / FSG | 3439 / 34 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories |
| Status | ACTIVE |
| Length | 13.500 INCHES NOMINAL IN |
| Content Within Each Unit Package | 1 LB LBS |
| Physical Form | BAR |
| Width | 0.750 INCHES NOMINAL IN |
| Chemical Composition Percentage | 63 TIN; 37 LEAD |
| Thickness | 0.375 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SN63BS | 3/2 Design control — primary reference U.S. Government activity |
| ASTM B32 | 3/1 Design control — primary reference U.S. Government activity |
| ASTM B32 SN63BS | 5/9 Secondary reference U.S. Government activity |
| QQS571SN63BS1LB | 5/9 Secondary reference U.S. Government activity |
NSN 3439-01-371-6859 is a Solder,lead-Tin Alloy, classified under FSC 3439, Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories. Status: active.
Key specifications for 3439-01-371-6859: Length: 13.500 INCHES NOMINAL IN; Content Within Each Unit Package: 1 LB LBS; Physical Form: BAR; Special Features: USED FOR SOLDERING PRINTED CIRCUITS WHERE TEMPERATURE LIMITATIONS ARE CRITICAL AND IN APPLICATIONS WHERE AN EXTREMELY SHORT MELTING RANGE IS REQUIRED. 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.