The Back-Up Ring,preformed Packing, cataloged under National Stock Number 5330-01-656-2672, is classified within Federal Supply Class 5330 (Packing and Gasket Materials) of the Hardware and Abrasives group. The manufacturer of record is Cat Pumps Corp. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5330-01-656-2672 |
| Primary Part Number | 701598 |
| Item Name | Back-Up Ring,preformed Packing |
| FSC / FSG | 5330 / 53 — Packing and Gasket Materials |
| Manufacturer | Cat Pumps Corp |
| Status | ACTIVE |
| Cross-Sectional Shape Style | SINGLE TURN SPIRAL |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE |
| 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 |
|---|---|
| 701598 PRIMARY | Cat Pumps Corp (USA) |
NSN 5330-01-656-2672 is a Back-Up Ring,preformed Packing, manufactured by Cat Pumps Corp, classified under FSC 5330, Packing and Gasket Materials. Status: active.
NSN 5330-01-656-2672 has 1 manufacturer part number on file: 701598 (Cat Pumps Corp).
Key specifications for 701598: Cross-Sectional Shape Style: SINGLE TURN SPIRAL; Part Name Assigned by Controlling Agency: BACK UP RING, V. P. CYLINDER; End Item Identification: PLUNGER PUMP; Material: PLASTIC POLYTETRAFLUOROETHYLENE. 2 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.
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.