The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-01-406-8853, 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 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-406-8853 |
| Primary Part Number | 803-5196808 PC 100 45PSI 50GPM |
| 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 | 50.0 GALLONS PER MINUTE OIL |
| Pressure Rating | 45.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Strainer Type and Quantity | 18 SCREEN |
| End Connection Component Type and Size for Which Designed | 3.000 IN. 250.0 LB NAVY FLANGES LBS |
| Design Type | STRAIGHT |
| Diameter | 3.000 INCHES NOMINAL IN |
| Material | COPPER ALLOY 706 BODY |
| Orifice Diameter | 0.375 INCHES NOMINAL IN |
| End Connection Similarity | NOT IDENTICAL |
| 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 |
|---|---|
| 803-5196808 PC 100 45PSI 50GPM PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 803-5196808-PC. | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
| 803-5196808 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4730-01-406-8853 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 4730-01-406-8853 has 1 manufacturer part number on file: 803-5196808 PC 100 45PSI 50GPM (Naval Sea Systems Command).
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-407-0693, 4730-01-407-0970, 4730-01-408-4947. Verify interchangeability with system specifications before substitution.
Key specifications for 803-5196808 PC 100 45PSI 50GPM: Flow Rate and Fluid Type: 50.0 GALLONS PER MINUTE OIL; Pressure Rating: 45.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Strainer Type and Quantity: 18 SCREEN; End Connection Component Type and Size for Which Designed: 3.000 IN. 250.0 LB NAVY FLANGES LBS. 9 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.