The Ring,wearing, cataloged under National Stock Number 4320-01-331-6637, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Pentair Flow Technologies, Llc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-01-331-6637 |
| Primary Part Number | 676-1156-209 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Pentair Flow Technologies, Llc |
| Status | ACTIVE |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 676-1156-209 PRIMARY | Pentair Flow Technologies, Llc (USA) |
| Reference | Meaning |
|---|---|
| 676-1156-209 | 3/9 Design control — primary reference Aurora Pump a Unit of General Signal Corp |
| 676-1156-209 | 5/9 Secondary reference Carver Pump Company |
| 7230183000 PIECE 15 | 5/9 Secondary reference Carver Pump Company |
| 7230183000 | D/9 Drawing number reference only Aurora Pump a Unit of General Signal Corp |
NSN 4320-01-331-6637 is a Ring,wearing, manufactured by Pentair Flow Technologies, Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-331-6637 has 1 manufacturer part number on file: 676-1156-209 (Pentair Flow Technologies, Llc).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-331-8847. Verify interchangeability with system specifications before substitution.
Key specifications for 676-1156-209: End Item Identification: 4X5-9 CENTRIFUGAL PUMP MODEL 361; Material: COPPER ALLOY. 1 specification is 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.