The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-01-512-2277, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-512-2277 |
| Primary Part Number | 514-6404906-AY65 |
| Item Name | Restrictor Unit,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flow Rate and Fluid Type | 25.0 GALLONS PER MINUTE WATER |
| Pressure Rating | 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Strainer Type and Quantity | PLATES, 11 |
| End Connection Component Type and Size for Which Designed | FLANGED 3 INCH PIPE IN |
| Design Type | STRAIGHT |
| Criticality Code Justification | FEAT |
| Valve Size | 3.000 INCHES IN |
| Material | COPPER ALLOY 706 BODY |
| Orifice Diameter | 0.375 INCHES NOMINAL IN |
| End Connection Similarity | IDENTICAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 514-6404906-AY65 PRIMARY | Naval Sea Systems Command (USA) |
| 15119396 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6404906C03 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4730-01-512-2277 is a Restrictor Unit,fluid Flow, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-512-2277 has 2 manufacturer part numbers on file: 514-6404906-AY65 (Naval Sea Systems Command), 15119396 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-512-2282. Verify interchangeability with system specifications before substitution.
Key specifications for 514-6404906-AY65: Flow Rate and Fluid Type: 25.0 GALLONS PER MINUTE WATER; Pressure Rating: 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Strainer Type and Quantity: PLATES, 11; End Connection Component Type and Size for Which Designed: FLANGED 3 INCH PIPE 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.