The Ring,wearing, cataloged under National Stock Number 4320-00-640-1086, 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 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4320-00-640-1086 |
| Primary Part Number | R476PC39 |
| 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 |
| Body Style | GROOVED |
| Body Outside Diameter | 5.377 INCHES NOMINAL IN |
| Groove Depth | 0.062 INCHES NOMINAL IN |
| Distance From End to Groove Center | 0.188 INCHES NOMINAL IN |
| Groove Quantity | 2 |
| Body Inside Diameter | 4.876 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Groove Width | 0.125 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 |
|---|---|
| R476PC39 PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| Reference | Meaning |
|---|---|
| B114A | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
NSN 4320-00-640-1086 is a Ring,wearing, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-640-1086 has 1 manufacturer part number on file: R476PC39 (Circor Naval Solutions Llc Dba Warren Pumps).
2 possible matches (shared part number, not a government interchangeability claim): 8455-01-524-2269, 8455-01-524-2293. Verify interchangeability with system specifications before substitution.
Key specifications for R476PC39: Surface Finish: 125.0 MICROINCHES ALL SURFACES; Corner Shape: SQUARE ALL CORNERS; Body Style: GROOVED; Body Outside Diameter: 5.377 INCHES NOMINAL IN. 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.