The Ring,wearing, cataloged under National Stock Number 4320-01-280-4099, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Carver Pump Company. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4320-01-280-4099 |
| Primary Part Number | US7-08N-001-305 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Carver Pump Company |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES OUTSIDE |
| Surface Finish | 125.0 MICROINCHES LEFT FACE |
| Surface Finish | 125.0 MICROINCHES RIGHT FACE |
| Surface Finish | 250.0 MICROINCHES INSIDE |
| Corner Shape | SQUARE ALL CORNERS |
| Body Style | PLAIN |
| Body Outside Diameter | 3.625 INCHES MINIMUM AND 3.626 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-N-288,COMP D MIL SPEC SINGLE MATERIAL RESPONSE |
| Body Inside Diameter | 3.188 INCHES NOMINAL IN |
| Material | NICKEL ALLOY D |
| 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 |
|---|---|
| US7-08N-001-305 PRIMARY | Carver Pump Company (USA) |
| Reference | Meaning |
|---|---|
| US7-08N-0-01-305 | 5/9 Secondary reference Carver Pump Company |
| A-US7-08N-0-01-305 | 5/9 Secondary reference Carver Pump Company |
NSN 4320-01-280-4099 is a Ring,wearing, manufactured by Carver Pump Company, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-280-4099 has 1 manufacturer part number on file: US7-08N-001-305 (Carver Pump Company).
Key specifications for US7-08N-001-305: Surface Finish: 125.0 MICROINCHES OUTSIDE; Surface Finish: 125.0 MICROINCHES LEFT FACE; Surface Finish: 125.0 MICROINCHES RIGHT FACE; Surface Finish: 250.0 MICROINCHES INSIDE. 10 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.