The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-01-173-4301, 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 The Boeing Company Div Defense. Government technical data includes 13 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-173-4301 |
| Primary Part Number | 7M576-2 |
| Item Name | Restrictor Unit,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Flow Rate and Fluid Type | 0.41 GALLONS PER MINUTE OIL |
| Pressure Rating | 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Strainer Type and Quantity | 2 SCREEN |
| Design Type | STRAIGHT |
| Thread Series | UNS ALL CONNECTIONS |
| End Connection Type | THREADED MALE TUBE ALL CONNECTIONS |
| Material Document and Classification | AMS 4965 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Thread Direction | RIGHT-HAND ALL CONNECTIONS |
| Thread Size Designator | 7/16-20 ALL CONNECTIONS |
| Thread Class | 3A ALL CONNECTIONS A |
| Material | STEEL CORROSION RESISTING SCREENING |
| Material | TITANIUM ALLOY UNS R56400 BODY |
| 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 | X |
| Part Number | Manufacturer |
|---|---|
| 7M576-2 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| JETX0504800A | 3/2 Design control — primary reference U.S. Government activity |
| JETX0504800AA | 5/9 Secondary reference U.S. Government activity |
| 7M576 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 4730-01-173-4301 is a Restrictor Unit,fluid Flow, manufactured by The Boeing Company Div Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-173-4301 has 1 manufacturer part number on file: 7M576-2 (The Boeing Company Div Defense).
Key specifications for 7M576-2: Flow Rate and Fluid Type: 0.41 GALLONS PER MINUTE OIL; Pressure Rating: 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Strainer Type and Quantity: 2 SCREEN; Design Type: STRAIGHT. 13 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.