The Restrictor,fluid Flow, cataloged under National Stock Number 4730-01-144-3773, 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. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-144-3773 |
| Primary Part Number | A02D2420-6 |
| Item Name | Restrictor,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| Length | 2.200 INCHES NOMINAL IN |
| Thread Provision | UNTHREADED LOCATION NOT OTHERWISE SPECIFIED |
| Design Type | CONCAVE DISK |
| Outside Diameter | 11.750 INCHES NOMINAL IN |
| Material | STEEL |
| Orifice Diameter | 6.600 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 |
|---|---|
| A02D2420-6 PRIMARY | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| A02D2420 | D/9 Drawing number reference only The Boeing Company |
| A02D2420-3 | 5/9 Secondary reference The Boeing Company |
NSN 4730-01-144-3773 is a Restrictor,fluid Flow, manufactured by The Boeing Company, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-144-3773 has 1 manufacturer part number on file: A02D2420-6 (The Boeing Company).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-152-2518. Verify interchangeability with system specifications before substitution.
Key specifications for A02D2420-6: Length: 2.200 INCHES NOMINAL IN; Thread Provision: UNTHREADED LOCATION NOT OTHERWISE SPECIFIED; Design Type: CONCAVE DISK; Outside Diameter: 11.750 INCHES NOMINAL IN. 6 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.