The Ring,wearing, cataloged under National Stock Number 4320-00-398-6933, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Naval Sea Systems Command Logistics Support Engineering Activity. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-398-6933 |
| Primary Part Number | H4320-398-6933 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Naval Sea Systems Command Logistics Support Engineering Activity |
| Status | ACTIVE |
| Center Flange Thickness | 0.248 INCHES NOMINAL IN |
| Surface Finish | 63.0 MICROINCHES INSIDE |
| Surface Finish | 63.0 MICROINCHES COUNTERBORE |
| Surface Finish | 63.0 MICROINCHES OUTSIDE |
| Flange Diameter | 4.188 INCHES NOMINAL 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 |
| Internal Flange Outside Diameter | 3.167 INCHES NOMINAL IN |
| Body Style | INTERNAL AND EXTERNAL FLANGE |
| Internal Flange Lip Width | 0.250 INCHES NOMINAL IN |
| Body Outside Diameter | 3.875 INCHES NOMINAL IN |
| End to Flange Distance | 0.343 INCHES NOMINAL IN |
| Internal Flange Inside Diameter | 2.750 INCHES NOMINAL IN |
| Body Inside Diameter | 3.437 INCHES NOMINAL IN |
| Positioning Lug Length | 0.156 INCHES NOMINAL IN |
| Positioning Lug Width | 0.438 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Internal Flange Width | 0.468 INCHES NOMINAL IN |
| 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 |
|---|---|
| H4320-398-6933 PRIMARY | Naval Sea Systems Command Logistics Support Engineering Activity (USA) |
| Reference | Meaning |
|---|---|
| H583EX2 | 5/9 Secondary reference Siemens Energy, Inc. |
NSN 4320-00-398-6933 is a Ring,wearing, manufactured by Naval Sea Systems Command Logistics Support Engineering Activity, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-398-6933 has 1 manufacturer part number on file: H4320-398-6933 (Naval Sea Systems Command Logistics Support Engineering Activity).
Key specifications for H4320-398-6933: Center Flange Thickness: 0.248 INCHES NOMINAL IN; Surface Finish: 63.0 MICROINCHES INSIDE; Surface Finish: 63.0 MICROINCHES COUNTERBORE; Surface Finish: 63.0 MICROINCHES OUTSIDE. 20 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.