The Ring,wearing, cataloged under National Stock Number 4320-00-398-6345, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-00-398-6345 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Status | ACTIVE |
| Center Flange Thickness | 0.188 INCHES NOMINAL IN |
| Flange Diameter | 4.219 INCHES MINIMUM AND 4.244 INCHES MAXIMUM IN |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | ROUND INSIDE RIGHT CORNER |
| Corner Radius | 0.312 INCHES NOMINAL INSIDE RIGHT CORNER IN |
| Internal Flange Outside Diameter | 2.299 INCHES MINIMUM AND 2.301 INCHES MAXIMUM IN |
| Body Outside Diameter | 4.000 INCHES NOMINAL IN |
| Internal Flange Inside Diameter | 2.000 INCHES NOMINAL IN |
| Body Inside Diameter | 3.138 INCHES MINIMUM AND 3.140 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 |
| Reference | Meaning |
|---|---|
| CA6383 | 3/2 Design control — primary reference U.S. Government activity |
| CA6381-13-1 | 5/2 Secondary reference U.S. Government activity |
NSN 4320-00-398-6345 is a Ring,wearing, classified under FSC 4320, Power and Hand Pumps. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6150-01-609-5556. Verify interchangeability with system specifications before substitution.
Key specifications for 4320-00-398-6345: Center Flange Thickness: 0.188 INCHES NOMINAL IN; Flange Diameter: 4.219 INCHES MINIMUM AND 4.244 INCHES MAXIMUM IN; Corner Shape: SQUARE OUTSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE LEFT CORNER. 12 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.