The Restrictor,fluid Flow, cataloged under National Stock Number 4730-01-490-6152, 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 16 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-490-6152 |
| Primary Part Number | 801-6640811 PC 154-3 |
| Item Name | Restrictor,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Length | 13.875 INCHES NOMINAL IN |
| Thread Provision | THREADED FIFTH PROVISION |
| Thread Provision | THREADED FOURTH PROVISION |
| Design Type | PLATE |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) FIFTH PROVISION |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) FOURTH PROVISION |
| Thread Length | 13.875 INCHES NOMINAL FOURTH PROVISION IN |
| Outside Diameter | 3.235 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND FIFTH PROVISION |
| Thread Direction | RIGHT-HAND FOURTH PROVISION |
| Thread Size Designator | 3/8-16 FIFTH PROVISION |
| Thread Size Designator | 3/8-16 FOURTH PROVISION |
| Thread Class | 2A FOURTH PROVISION A |
| Thread Class | 3B FIFTH PROVISION |
| Material | COPPER ALLOY 706 OR NICKEL ALLOY |
| Orifice Diameter | 0.375 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 |
|---|---|
| 801-6640811 PC 154-3 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6640811 | D/9 Drawing number reference only Naval Sea Systems Command |
| 2633-561-01 PC 154-3 | 3/2 Design control — primary reference U.S. Government activity |
| 2633-561-01 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-490-6152 is a Restrictor,fluid Flow, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-490-6152 has 1 manufacturer part number on file: 801-6640811 PC 154-3 (Naval Sea Systems Command).
Key specifications for 801-6640811 PC 154-3: Length: 13.875 INCHES NOMINAL IN; Thread Provision: THREADED FIFTH PROVISION; Thread Provision: THREADED FOURTH PROVISION; Design Type: PLATE. 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.