The Ring,lantern, cataloged under National Stock Number 4320-00-678-8501, 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 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | 4320-00-678-8501 |
| Primary Part Number | R-656 PC49 |
| Item Name | Ring,lantern |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Circor Naval Solutions Llc Dba Warren Pumps |
| Status | ACTIVE |
| Outside Diameter | 1.984 INCHES NOMINAL IN |
| Inside Diameter | 1.422 INCHES NOMINAL IN |
| Height | 0.625 INCHES NOMINAL IN |
| Material | COPPER ALLOY 903 OVERALL |
| 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 |
|---|---|
| H66 | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| R-656 PC49 PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
NSN 4320-00-678-8501 is a Ring,lantern, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-678-8501 has 2 manufacturer part numbers on file: H66 (Circor Naval Solutions Llc Dba Warren Pumps), R-656 PC49 (Circor Naval Solutions Llc Dba Warren Pumps).
2 possible matches (shared part number, not a government interchangeability claim): 5950-00-789-8056, 5365-00-886-5882. Verify interchangeability with system specifications before substitution.
Key specifications for R-656 PC49: Outside Diameter: 1.984 INCHES NOMINAL IN; Inside Diameter: 1.422 INCHES NOMINAL IN; Height: 0.625 INCHES NOMINAL IN; Special Features: TWO NOTCHES ON OUTSIDE EDGES180 DEG APART. 4 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.