The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-01-128-9673, 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 19 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-128-9673 |
| Primary Part Number | 7M572-1 |
| 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 | 0.16 GALLONS PER MINUTE OIL |
| Pressure Rating | 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Width Across Flats | 0.812 INCHES NOMINAL IN |
| Strainer Type and Quantity | 1 SCREEN |
| Design Type | STRAIGHT |
| Thread Series | UNF FIRST CONNECTION |
| Thread Series | UNF SECOND CONNECTION |
| End Connection Type | THREADED MALE TUBE SECOND CONNECTION |
| End Connection Type | THREADED MALE, GASKET SEAL FIRST CONNECTION |
| Material Document and Classification | AMS 4965 ASSN STD SINGLE MATERIAL RESPONSE LOCATION NOT OTHERWISE SPECIFIED |
| Thread Direction | RIGHT-HAND SECOND CONNECTION |
| Thread Direction | RIGHT-HAND FIRST CONNECTION |
| Thread Size Designator | 7/16-20 FIRST CONNECTION |
| Thread Size Designator | 9/16-18 SECOND CONNECTION |
| Thread Class | 2A SECOND CONNECTION A |
| Thread Class | 2A FIRST CONNECTION A |
| Material | STEEL CORROSION RESISTING SCREENING |
| Material | TITANIUM ALLOY UNS R56400 BODY |
| 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 |
|---|---|
| 7M572-1 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| VDLX0501600AA | 5/1 Secondary reference U.S. Government activity |
| 10108653 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| VDLX0501600A | 5/2 Secondary reference U.S. Government activity |
| 7M572 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 4730-01-128-9673 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 4730-01-128-9673 has 1 manufacturer part number on file: 7M572-1 (The Boeing Company Div Defense).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-173-4302. Verify interchangeability with system specifications before substitution.
Key specifications for 7M572-1: Flow Rate and Fluid Type: 0.16 GALLONS PER MINUTE OIL; Pressure Rating: 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Width Across Flats: 0.812 INCHES NOMINAL IN; Strainer Type and Quantity: 1 SCREEN. 19 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.