The Back-Up Ring,preformed Packing, cataloged under National Stock Number 5330-01-597-5608, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is John Crane, Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Back-Up Ring,preformed Packing |
| FSC / FSG | 5330 — Packing and Gasket Materials (FSG 53) |
| Manufacturers | John Crane, Inc (CAGE 71724); Carver Pump Company (CAGE 10941) |
| Parameter | Value |
|---|---|
| NSN | 5330-01-597-5608 |
| Primary Part Number | 2125-2625-025-P006 |
| Item Name | Back-Up Ring,preformed Packing |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | John Crane, 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 |
|---|---|
| 2125-2625-025-P006 PRIMARY | John Crane, Inc (USA) |
| 180-250-009-399 | Carver Pump Company (USA) |
| Reference | Meaning |
|---|---|
| NGG-0-99-001 ITEM NO 53 | D/9 Drawing number reference only Carver Pump Company |
| 180-250-009C399 | 5/9 Secondary reference Carver Pump Company |
NSN 5330-01-597-5608 is a Back-Up Ring,preformed Packing, manufactured by John Crane, Inc, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-597-5608 has 2 manufacturer part numbers on file: 2125-2625-025-P006 (John Crane, Inc), 180-250-009-399 (Carver Pump Company).
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.