The Rod,welding, cataloged under National Stock Number 3439-00-252-8350, 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 American Welding Society, Inc.. Government technical data includes 12 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 3439-00-252-8350 |
| Primary Part Number | AWSA5.7-77 ERCUSN-A 0.250 10LB |
| Item Name | Rod,welding |
| FSC / FSG | 3439 / 34 — Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories |
| Manufacturer | American Welding Society, Inc. |
| Status | CANCELLED |
| Length | 36.000 INCHES NOMINAL IN |
| Unit Package Type | CAN, HERMETICALLY SEALED |
| Filler Metal Chemical Composition in Percent | 0.35 PHOSPHOROUS NOMINAL SECOND ELEMENT |
| Filler Metal Chemical Composition in Percent | 94.00 COPPER NOMINAL FIRST ELEMENT |
| Weld Position for Which Designed | HORIZONTAL |
| Material Document and Classification | AWSA5.7-77,CL ERCUSN-A ASSN STD SINGLE MATERIAL RESPONSE FILLER |
| Shape | ROUND |
| Outside Diameter | 0.250 INCHES NOMINAL IN |
| Quantity Within Each Unit Package | 10.000 POUNDS LBS |
| Process Type for Which Designed | GAS TUNGSTEN ARC |
| Physical Form | STRAIGHT |
| Material | COPPER ALLOY FILLER |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AWSA5.7-77 ERCUSN-A 0.250 10LB PRIMARY | American Welding Society, Inc. (USA) |
| Reference | Meaning |
|---|---|
| MIL-RCUSN-A 0.250 | 5/9 Secondary reference U.S. Government activity |
| MIL-R-19631 | 5/9 Secondary reference U.S. Government activity |
| AWS A5.7 | 3/1 Design control — primary reference American Welding Society, Inc. |
NSN 3439-00-252-8350 is a Rod,welding, manufactured by American Welding Society, Inc., classified under FSC 3439, Miscellaneous Welding, Soldering, and Brazing Supplies and Accessories. Status: cancelled.
NSN 3439-00-252-8350 has 1 manufacturer part number on file: AWSA5.7-77 ERCUSN-A 0.250 10LB (American Welding Society, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 3439-00-252-8352, 3439-00-255-7757. Verify interchangeability with system specifications before substitution.
Key specifications for AWSA5.7-77 ERCUSN-A 0.250 10LB: Length: 36.000 INCHES NOMINAL IN; Unit Package Type: CAN, HERMETICALLY SEALED; Filler Metal Chemical Composition in Percent: 0.35 PHOSPHOROUS NOMINAL SECOND ELEMENT; Filler Metal Chemical Composition in Percent: 94.00 COPPER NOMINAL FIRST ELEMENT. 12 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.
NSN 3439-00-252-8350 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.