The Ring,wearing, cataloged under National Stock Number 4320-01-504-0425, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Carver Pump Company. Government technical data includes 2 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-504-0425 |
| Primary Part Number | US7-02-012-552 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Carver Pump Company |
| Status | ACTIVE |
| Material Document and Classification | 803-7226047 MFR REF SINGLE MATERIAL RESPONSE |
| Material | PLASTIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| US7-02-012-552 | Carver Pump Company (USA) |
| Reference | Meaning |
|---|---|
| 999-1107-A-04 | D/9 Drawing number reference only Carver Pump Company |
| 999-1107-A-04 REV 4 ITEM 7A | 5/9 Secondary reference Carver Pump Company |
| 999-1107-A-04-7A | 3/9 Design control — primary reference Carver Pump Company |
NSN 4320-01-504-0425 is a Ring,wearing, manufactured by Carver Pump Company, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-504-0425 has 1 manufacturer part number on file: US7-02-012-552 (Carver Pump Company).
2 possible matches (shared part number, not a government interchangeability claim): 4320-01-504-0524, 4320-01-512-6020. Verify interchangeability with system specifications before substitution.
Key specifications for US7-02-012-552: Material Document and Classification: 803-7226047 MFR REF SINGLE MATERIAL RESPONSE; Special Features: INSIDE DIAMETER OF WEAR RING (ITEM 7) IS .135 UNDERSIZE WHEN FURNISHED AS A REPAIR PART AND IS DESIGNATED AS P/N 999-1107-A-04-7A A; End Item Identification: PUMP,CENTRIFUGAL; Material: PLASTIC. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.