The Coupling,tube, cataloged under National Stock Number 4730-00-402-0033, 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 The Entwistle Company Llc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-402-0033 |
| Primary Part Number | 425255-2 |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 425255-2 | The Entwistle Company Llc (USA) |
| 425255-2 | Hamill Manufacturing Company Dba Hamill Manufacturing Co (USA) |
| 425255-2 | Penn State Tool & Die Corp (USA) |
| Reference | Meaning |
|---|---|
| 418423-3 | 5/9 Secondary reference U.S. Government activity |
| 425255-2 | 5/9 Secondary reference Oldenburg Group Incorporated Div Oldenburg - Lake Shore |
| 425255-2 | 5/2 Secondary reference U.S. Government activity |
| 425255-2 | 3/2 Design control — primary reference U.S. Government activity |
| 425255-2 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-00-402-0033 is a Coupling,tube, manufactured by The Entwistle Company Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-402-0033 has 3 manufacturer part numbers on file: 425255-2 (The Entwistle Company Llc), 425255-2 (Hamill Manufacturing Company Dba Hamill Manufacturing Co), 425255-2 (Penn State Tool & Die Corp).
1 possible match (shared part number, not a government interchangeability claim): 5325-01-152-2378. Verify interchangeability with system specifications before substitution.
Key specifications for 425255-2: Material: STEEL OVERALL. 1 specification is 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.