The Restrictor,fluid Flow, cataloged under National Stock Number 4730-01-422-9577, 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 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-422-9577 |
| Primary Part Number | 564-6405176 FIND 29 |
| Item Name | Restrictor,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Length | 0.125 INCHES NOMINAL IN |
| Thread Provision | UNTHREADED LOCATION NOT OTHERWISE SPECIFIED |
| Design Type | PLATE |
| Outside Diameter | 10.750 INCHES NOMINAL IN |
| Material | NICKEL ALLOY 400 |
| Orifice Diameter | 0.315 INCHES MINIMUM AND 0.320 INCHES MAXIMUM 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 |
|---|---|
| 564-6405176 FIND 29 PRIMARY | Naval Sea Systems Command (USA) |
| 564-6405176-29 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6405176 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4730-01-422-9577 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 4730-01-422-9577 has 2 manufacturer part numbers on file: 564-6405176 FIND 29 (Naval Sea Systems Command), 564-6405176-29 (Naval Sea Systems Command).
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-422-9585, 4730-01-434-5318, 4730-01-434-5319. Verify interchangeability with system specifications before substitution.
Key specifications for 564-6405176 FIND 29: Length: 0.125 INCHES NOMINAL IN; Thread Provision: UNTHREADED LOCATION NOT OTHERWISE SPECIFIED; Design Type: PLATE; Outside Diameter: 10.750 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.