The Ring,wearing, cataloged under National Stock Number 4320-00-989-7698, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings). Government technical data includes 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-989-7698 |
| Primary Part Number | CS4320-0140 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES ALL SURFACES |
| Corner Shape | SQUARE ALL CORNERS |
| Body Style | PLAIN |
| Body Outside Diameter | 4.000 INCHES MINIMUM AND 4.001 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-B-16261,GRADE 2-CANCELED MIL SPEC SINGLE MATERIAL RESPONSE |
| Body Inside Diameter | 3.612 INCHES MINIMUM AND 3.613 INCHES MAXIMUM IN |
| 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 |
|---|---|
| CS4320-0140 PRIMARY | Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) (USA) |
| Reference | Meaning |
|---|---|
| A2YL180A1US251 | 5/9 Secondary reference Carver Pump Company |
| A2YL180A1US | 5/9 Secondary reference Carver Pump Company |
NSN 4320-00-989-7698 is a Ring,wearing, manufactured by Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings), classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-989-7698 has 1 manufacturer part number on file: CS4320-0140 (Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings)).
Key specifications for CS4320-0140: Surface Finish: 125.0 MICROINCHES ALL SURFACES; Corner Shape: SQUARE ALL CORNERS; Body Style: PLAIN; Body Outside Diameter: 4.000 INCHES MINIMUM AND 4.001 INCHES MAXIMUM IN. 7 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.