The Ring,wearing, cataloged under National Stock Number 4320-01-185-6078, 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 16 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-185-6078 |
| Primary Part Number | 654Q0129C051A |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Circor Naval Solutions Llc Dba Warren Pumps |
| Status | ACTIVE |
| Surface Finish | 125.0 MICROINCHES ALL SURFACES |
| Corner Shape | SQUARE ALL CORNERS |
| Distance Between Flanges | 0.500 INCHES NOMINAL IN |
| Body Style | INTERNAL FLANGE W/EXTERNAL LOCKING FLANGE |
| Distance From End | 0.250 INCHES NOMINAL IN |
| Body Outside Diameter | 3.500 INCHES NOMINAL IN |
| End to Flange Distance | 0.688 INCHES NOMINAL IN |
| Internal Flange Inside Diameter | 2.437 INCHES NOMINAL IN |
| Left Side Flange Thickness | 0.187 INCHES NOMINAL IN |
| Distance Below Centerline | 0.063 INCHES NOMINAL IN |
| Body Inside Diameter | 3.000 INCHES NOMINAL IN |
| Right Side Flange Thickness | 0.187 INCHES NOMINAL IN |
| Smallest External Anchor Flange Radius | 0.718 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Internal Flange Width | 0.375 INCHES NOMINAL IN |
| Largest External Anchor Flange Radius | 1.938 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 |
|---|---|
| 999R0142 PIECE 26 | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| 654Q0129C051A PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| 654Q0129 | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| Reference | Meaning |
|---|---|
| 999R0142 | D/9 Drawing number reference only Circor Naval Solutions Llc Dba Warren Pumps |
NSN 4320-01-185-6078 is a Ring,wearing, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-185-6078 has 3 manufacturer part numbers on file: 999R0142 PIECE 26 (Circor Naval Solutions Llc Dba Warren Pumps), 654Q0129C051A (Circor Naval Solutions Llc Dba Warren Pumps), 654Q0129 (Circor Naval Solutions Llc Dba Warren Pumps).
6 possible matches (shared part number, not a government interchangeability claim): 5342-01-185-6124, 4320-01-185-6131, 4320-01-185-6132. Verify interchangeability with system specifications before substitution.
Key specifications for 654Q0129C051A: Surface Finish: 125.0 MICROINCHES ALL SURFACES; Corner Shape: SQUARE ALL CORNERS; Distance Between Flanges: 0.500 INCHES NOMINAL IN; Body Style: INTERNAL FLANGE W/EXTERNAL LOCKING FLANGE. 16 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.