The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-01-274-9529, 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 16 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-274-9529 |
| Item Name | Restrictor Unit,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Width Across Flats | 0.688 INCHES NOMINAL IN |
| Strainer Type and Quantity | 1 SCREEN |
| End Connection Component Type and Size for Which Designed | 1/4 IN. OD TUBE IN |
| Design Type | STRAIGHT |
| Thread Series | UNF SECOND CONNECTION |
| End Connection Type | THREADED MALE TUBE SECOND CONNECTION |
| End Connection Type | THREADED MALE, REGULAR FLARE FIRST CONNECTION |
| Thread Direction | RIGHT-HAND SECOND CONNECTION |
| Thread Size Designator | 7/16-20 SECOND CONNECTION |
| Thread Class | 3A SECOND CONNECTION A |
| Unable to Decode | UNABLE TO DECODE |
| Material | STEEL CORROSION RESISTING SCREENING |
| Material | STEEL CORROSION RESISTING BODY |
| Orifice Diameter | 0.010 INCHES NOMINAL IN |
| End Connection Similarity | NOT IDENTICAL |
| Angle Between Connections | 37.0 DEGREES NOMINAL FIRST CONNECTION |
| 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 |
|---|---|
| 640-1094-001 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 640-1094 | D/9 Drawing number reference only Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| 640-1094-001 | 3/9 Design control — primary reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
NSN 4730-01-274-9529 is a Restrictor Unit,fluid Flow, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-274-9529: Width Across Flats: 0.688 INCHES NOMINAL IN; Strainer Type and Quantity: 1 SCREEN; End Connection Component Type and Size for Which Designed: 1/4 IN. OD TUBE IN; Design Type: STRAIGHT. 16 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.