The Coupling,tube, cataloged under National Stock Number 4730-00-357-9311, 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 Penn State Tool & Die Corp. Government technical data includes 6 specifications, 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-357-9311 |
| Primary Part Number | 425255-1 |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Penn State Tool & Die Corp |
| Status | ACTIVE |
| Nominal Overall Length | 4.250 INCHES IN |
| Nominal Thread Size | 1.000 INCHES FIRST END IN |
| Thread Class | 3B FIRST END |
| Thread Quantity Per Inch | 12 FIRST END |
| Material | STEEL OVERALL |
| Thread Series Designator | UNS FIRST END |
| 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 |
|---|---|
| 425255-1 | Penn State Tool & Die Corp (USA) |
| 425255-1 | The Entwistle Company Llc (USA) |
| 425255-1 | Hamill Manufacturing Company Dba Hamill Manufacturing Co (USA) |
| Reference | Meaning |
|---|---|
| 425255-1 | 3/2 Design control — primary reference U.S. Government activity |
| 418423-1 | 3/9 Design control — primary reference U.S. Government activity |
| 425255-1 | 5/2 Secondary reference U.S. Government activity |
| 425255-1 | 5/2 Secondary reference U.S. Government activity |
| 425255-1 | 5/9 Secondary reference Oldenburg Group Incorporated Div Oldenburg - Lake Shore |
NSN 4730-00-357-9311 is a Coupling,tube, manufactured by Penn State Tool & Die Corp, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-357-9311 has 3 manufacturer part numbers on file: 425255-1 (Penn State Tool & Die Corp), 425255-1 (The Entwistle Company Llc), 425255-1 (Hamill Manufacturing Company Dba Hamill Manufacturing Co).
1 possible match (shared part number, not a government interchangeability claim): 6685-01-655-0382. Verify interchangeability with system specifications before substitution.
Key specifications for 425255-1: Nominal Overall Length: 4.250 INCHES IN; Nominal Thread Size: 1.000 INCHES FIRST END IN; Thread Class: 3B FIRST END; Thread Quantity Per Inch: 12 FIRST END. 6 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.