The Restrictor Unit,fluid Flow, cataloged under National Stock Number 4730-01-031-6612, 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 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-031-6612 |
| 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 | 3/8 IN. OD TUBE IN |
| Design Type | STRAIGHT |
| Thread Series | UNF FIRST CONNECTION |
| End Connection Type | FLARE TUBE FIRST CONNECTION |
| End Connection Type | THREADED MALE, FLARELESS TUBE SECOND CONNECTION |
| Material Document and Classification | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI 304 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 30304 ASSN STD SINGLE MATERIAL RESPONSE SCREENING |
| Valve Size | 0.375 INCHES IN |
| Thread Direction | RIGHT-HAND FIRST CONNECTION |
| Thread Size Designator | 7/16-20 FIRST CONNECTION |
| Thread Class | 3A FIRST CONNECTION A |
| Unable to Decode | UNABLE TO DECODE |
| Material | STEEL CORROSION RESISTING BODY |
| Material | STEEL COMP 304 SCREENING |
| 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 |
|---|---|
| VDLX0500100A | 3/2 Design control — primary reference U.S. Government activity |
| VDLX0500100AA | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-031-6612 is a Restrictor Unit,fluid Flow, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-031-6612: Width Across Flats: 0.688 INCHES NOMINAL IN; Strainer Type and Quantity: 1 SCREEN; End Connection Component Type and Size for Which Designed: 3/8 IN. OD TUBE IN; Design Type: STRAIGHT. 17 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.