The Coupling,tube, cataloged under National Stock Number 4730-01-444-8531, 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 Parker-Hannifin Corporation Div Stratoflex Products Division Coupling Business Unit. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-444-8531 |
| Primary Part Number | 558001-303 |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Parker-Hannifin Corporation Div Stratoflex Products Division Coupling Business Unit |
| Status | ACTIVE |
| 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 |
|---|---|
| 558001-303 | Parker-Hannifin Corporation Div Stratoflex Products Division Coupling Business Unit (USA) |
| 901-380-038-303 | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 901-380-038 | D/9 Drawing number reference only The Boeing Company |
| 901-380-038-303 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-444-8531 is a Coupling,tube, manufactured by Parker-Hannifin Corporation Div Stratoflex Products Division Coupling Business Unit, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-444-8531 has 2 manufacturer part numbers on file: 558001-303 (Parker-Hannifin Corporation Div Stratoflex Products Division Coupling Business Unit), 901-380-038-303 (The Boeing Company).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-444-8534, 1680-01-484-8940. Verify interchangeability with system specifications before substitution.
Key specifications for 558001-303: End Item Identification: PREPROVISIONING SUPPORT NAVICP IS POE. 0 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.