The Solder,lead-Tin Alloy, cataloged under National Stock Number 3439-01-657-0693, 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 Alpha Metals Inc Div Alpha Assembly Solutions Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3439-01-657-0693 |
| Primary Part Number | 1001657 |
| Item Name | Solder,lead-Tin Alloy |
| FSC / FSG | 3439 / 34 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories |
| Manufacturer | Alpha Metals Inc Div Alpha Assembly Solutions Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 1001657 PRIMARY | Alpha Metals Inc Div Alpha Assembly Solutions Inc (USA) |
NSN 3439-01-657-0693 is a Solder,lead-Tin Alloy, manufactured by Alpha Metals Inc Div Alpha Assembly Solutions Inc, classified under FSC 3439, Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories. Status: active.
NSN 3439-01-657-0693 has 1 manufacturer part number on file: 1001657 (Alpha Metals Inc Div Alpha Assembly Solutions Inc).
1 possible match (shared part number, not a government interchangeability claim): 4220-01-669-3327. Verify interchangeability with system specifications before substitution.
Key specifications for 1001657: Special Features: SN63/PB37 1.27MM, 1.0KG/SPOOL KG; Part Name Assigned by Controlling Agency: ALPHA TELECORE PLUS CORED WIRE. 0 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.