The Restrictor,fluid Flow, cataloged under National Stock Number 4730-01-479-0128, 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 O'keefe Controls Co.. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-479-0128 |
| Primary Part Number | D-4-BR |
| Item Name | Restrictor,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | O'keefe Controls Co. |
| Status | ACTIVE |
| Length | 0.880 INCHES NOMINAL IN |
| Thread Provision | THREADED LOCATION NOT OTHERWISE SPECIFIED |
| Design Type | TUBULAR, HEX SHAPE |
| Thread Series | NPTF LOCATION NOT OTHERWISE SPECIFIED |
| Thread Length | 0.125 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN |
| Outside Diameter | 0.562 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED |
| Thread Size Designator | 1/8-20 LOCATION NOT OTHERWISE SPECIFIED |
| Thread Class | 2A FIRST PROVISION A |
| Thread Class | 2B SECOND PROVISION |
| Material | COPPER ALLOY |
| Orifice Diameter | 0.003 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 |
|---|---|
| D-4-BR PRIMARY | O'keefe Controls Co. (USA) |
| 581996-001 | Pacific Consolidated Industries Llc (USA) |
| Reference | Meaning |
|---|---|
| D-4-BR | 5/9 Secondary reference Okeefe Controls Co |
NSN 4730-01-479-0128 is a Restrictor,fluid Flow, manufactured by O'keefe Controls Co., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-479-0128 has 2 manufacturer part numbers on file: D-4-BR (O'keefe Controls Co.), 581996-001 (Pacific Consolidated Industries Llc).
Key specifications for D-4-BR: Length: 0.880 INCHES NOMINAL IN; Thread Provision: THREADED LOCATION NOT OTHERWISE SPECIFIED; Design Type: TUBULAR, HEX SHAPE; Thread Series: NPTF LOCATION NOT OTHERWISE SPECIFIED. 12 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.