The Restrictor,fluid Flow, cataloged under National Stock Number 4730-01-485-6695, 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 Derbyshire Machine & Tool Co. Government technical data includes 8 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-485-6695 |
| Primary Part Number | 2633-561-01 PC 224 |
| Item Name | Restrictor,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Length | 53.250 INCHES NOMINAL IN |
| Thread Provision | THREADED LOCATION NOT OTHERWISE SPECIFIED |
| Design Type | PLATE |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) LOCATION NOT OTHERWISE SPECIFIED |
| Thread Size Designator | 3/8-16 LOCATION NOT OTHERWISE SPECIFIED |
| Thread Class | 3A LOCATION NOT OTHERWISE SPECIFIED A |
| Material | NICKEL ALLOY |
| Orifice Diameter | 0.125 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 |
|---|---|
| 2633-561-01 PC 224 | Derbyshire Machine & Tool Co (USA) |
| Reference | Meaning |
|---|---|
| 801-6640811 | D/9 Drawing number reference only Naval Sea Systems Command |
| 263356101-0224A | 3/2 Design control — primary reference U.S. Government activity |
| 2633-561-01 PC 224 | 5/2 Secondary reference U.S. Government activity |
| 2633-561-01 | D/9 Drawing number reference only Naval Sea Systems Command |
| 801-6640811 PC 224 | 3/1 Design control — primary reference Naval Sea Systems Command |
NSN 4730-01-485-6695 is a Restrictor,fluid Flow, manufactured by Derbyshire Machine & Tool Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-485-6695 has 1 manufacturer part number on file: 2633-561-01 PC 224 (Derbyshire Machine & Tool Co).
Key specifications for 2633-561-01 PC 224: Length: 53.250 INCHES NOMINAL IN; Thread Provision: THREADED LOCATION NOT OTHERWISE SPECIFIED; Design Type: PLATE; Thread Series: UNIFIED NATIONAL COARSE (UNC) LOCATION NOT OTHERWISE SPECIFIED. 8 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.