The Ring,wearing, cataloged under National Stock Number 4320-00-383-4397, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Circor Naval Solutions Llc Dba Warren Pumps. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-00-383-4397 |
| Primary Part Number | N-16862 |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Circor Naval Solutions Llc Dba Warren Pumps |
| Status | ACTIVE |
| Corner Shape | SQUARE OUTSIDE RIGHT CORNER |
| Corner Shape | SQUARE OUTSIDE LEFT CORNER |
| Corner Shape | SQUARE INSIDE LEFT CORNER |
| Corner Shape | ROUND INSIDE RIGHT CORNER |
| Distance Between Flanges | 0.750 INCHES NOMINAL IN |
| Corner Radius | 0.375 INCHES NOMINAL INSIDE RIGHT CORNER IN |
| Internal Flange Outside Diameter | 7.250 INCHES NOMINAL IN |
| Body Style | INTERNAL FLANGE W/EXTERNAL LOCKING FLANGE |
| Internal Flange Lip Width | 0.375 INCHES NOMINAL IN |
| Distance From End | 0.250 INCHES NOMINAL IN |
| Body Outside Diameter | 8.250 INCHES NOMINAL IN |
| End to Flange Distance | 1.000 INCHES NOMINAL IN |
| Internal Flange Inside Diameter | 6.250 INCHES NOMINAL IN |
| Left Side Flange Thickness | 0.250 INCHES NOMINAL IN |
| Distance Below Centerline | 0.093 INCHES NOMINAL IN |
| Body Inside Diameter | 7.687 INCHES NOMINAL IN |
| Right Side Flange Thickness | 0.250 INCHES NOMINAL IN |
| Smallest External Anchor Flange Radius | 4.125 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Internal Flange Width | 0.625 INCHES NOMINAL IN |
| Largest External Anchor Flange Radius | 4.375 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 |
|---|---|
| 55-22423-18US | Euramco Safety Inc (USA) |
| N-16862 PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| C201A PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| SMP-5560-R PRIMARY | Capitol Engine Co, Inc Dba Salmini Worldwide (USA) |
| Reference | Meaning |
|---|---|
| 999R0343PC15 | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
NSN 4320-00-383-4397 is a Ring,wearing, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-383-4397 has 4 manufacturer part numbers on file: 55-22423-18US (Euramco Safety Inc), N-16862 (Circor Naval Solutions Llc Dba Warren Pumps), C201A (Circor Naval Solutions Llc Dba Warren Pumps), SMP-5560-R (Capitol Engine Co, Inc Dba Salmini Worldwide).
1 possible match (shared part number, not a government interchangeability claim): 5985-01-161-7587. Verify interchangeability with system specifications before substitution.
Key specifications for N-16862: Corner Shape: SQUARE OUTSIDE RIGHT CORNER; Corner Shape: SQUARE OUTSIDE LEFT CORNER; Corner Shape: SQUARE INSIDE LEFT CORNER; Corner Shape: ROUND INSIDE RIGHT CORNER. 21 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.