The Restrictor,fluid Flow, cataloged under National Stock Number 4730-01-426-0251, 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 Metrex Valve Corp. Dba Metrex Valve Corp. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-426-0251 |
| Primary Part Number | 45M-129-2M |
| Item Name | Restrictor,fluid Flow |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Metrex Valve Corp. Dba Metrex Valve Corp |
| Status | ACTIVE |
| Design Type | PLATE |
| Material | NICKEL ALLOY 400 |
| 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 |
|---|---|
| 45M-129-2M PRIMARY | Metrex Valve Corp. Dba Metrex Valve Corp (USA) |
| Reference | Meaning |
|---|---|
| MDFPMX-3150-3W ITEM 30 | 5/9 Secondary reference Metrex Valve Corp. Dba Metrex Valve Corp |
| MDFPMX-3150-3W | D/9 Drawing number reference only Metrex Valve Corp. Dba Metrex Valve Corp |
NSN 4730-01-426-0251 is a Restrictor,fluid Flow, manufactured by Metrex Valve Corp. Dba Metrex Valve Corp, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-426-0251 has 1 manufacturer part number on file: 45M-129-2M (Metrex Valve Corp. Dba Metrex Valve Corp).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-426-0260, 4730-01-426-0263. Verify interchangeability with system specifications before substitution.
Key specifications for 45M-129-2M: Design Type: PLATE; End Item Identification: 6.000 IN. MDFPMX-3150-3W VALVE; STRATEGIC SEALIFT CONVERSION SHIPS CLASS W; Material: NICKEL ALLOY 400. 2 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.