The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-00-541-3971, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-541-3971 |
| Item Name | Restrictor Unit,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Pressure Rating | 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Width Across Flats | 0.750 INCHES NOMINAL IN |
| Strainer Type and Quantity | 1 FILTER |
| End Connection Component Type and Size for Which Designed | U/W 1/4 IN. OD TUBE IN |
| Design Type | STRAIGHT |
| Thread Series | UNF ALL CONNECTIONS |
| End Connection Type | THREADED MALE, COMPRESSION LOCATION NOT OTHERWISE SPECIFIED |
| Valve Size | 0.250 INCHES IN |
| Thread Direction | RIGHT-HAND LOCATION NOT OTHERWISE SPECIFIED |
| Thread Size Designator | 7/16-20 LOCATION NOT OTHERWISE SPECIFIED |
| Operating Temp Range | -75.0 TO 3000.0 FAHRENHEIT DEGF |
| Thread Class | 3A LOCATION NOT OTHERWISE SPECIFIED A |
| Material | RUBBER SYNTHETIC PACKING |
| Material | STEEL CORROSION RESISTING FILTER |
| Material | ALUMINUM ALLOY BODY |
| Orifice Diameter | 0.024 INCHES NOMINAL IN |
| End Connection Similarity | IDENTICAL |
| Compression Type | ERMETO LOCATION NOT OTHERWISE SPECIFIED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 6F1470-024 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-541-3971 is a Restrictor Unit,fluid Flow, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-541-3971: Pressure Rating: 3000.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Width Across Flats: 0.750 INCHES NOMINAL IN; Strainer Type and Quantity: 1 FILTER; End Connection Component Type and Size for Which Designed: U/W 1/4 IN. OD TUBE IN. 18 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.