The Ring,wearing, cataloged under National Stock Number 4320-01-331-6639, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4320-01-331-6639 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Status | ACTIVE |
| Body Style | PLAIN |
| Material Document and Classification | QQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE |
| Material | COPPER ALLOY 922 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 676-1146-210 | 3/9 Design control — primary reference Aurora Pump a Unit of General Signal Corp |
| 723-0189-000 | D/9 Drawing number reference only Aurora Pump a Unit of General Signal Corp |
| 676-1146-210 | 5/9 Secondary reference Carver Pump Company |
| 723-0189-000 PIECE 14 | 5/9 Secondary reference Carver Pump Company |
NSN 4320-01-331-6639 is a Ring,wearing, classified under FSC 4320, Power and Hand Pumps. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4320-01-331-6699, 4320-01-359-7032. Verify interchangeability with system specifications before substitution.
Key specifications for 4320-01-331-6639: Body Style: PLAIN; Material Document and Classification: QQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE; End Item Identification: COOLING PUMP,AURORA PUMP CO,MDL 361 SIZE 1-1/2X2X9; Material: COPPER ALLOY 922. 3 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.