The Restrictor,fluid Flow, cataloged under National Stock Number 4730-01-426-7855, 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 10 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-426-7855 |
| Item Name | Restrictor,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Length | 1.876 INCHES NOMINAL IN |
| Thread Provision | THREADED SINGLE PROVISION |
| Design Type | TUBULAR, HEX SHAPE |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST PROVISION |
| Hose/tube Size for Which Designed | 3/8 IN. OD TUBE IN |
| Outside Diameter | 0.813 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND FIRST PROVISION |
| Thread Size Designator | 9/16-18 FIRST PROVISION |
| Surface Treatment | PASSIVATE |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 9R3512-040 | 3/2 Design control — primary reference U.S. Government activity |
| 7D0285S06-00220 | 5/2 Secondary reference U.S. Government activity |
| 7D0285 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-426-7855 is a Restrictor,fluid Flow, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-497-5951. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-426-7855: Length: 1.876 INCHES NOMINAL IN; Thread Provision: THREADED SINGLE PROVISION; Design Type: TUBULAR, HEX SHAPE; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF) FIRST PROVISION. 10 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.