The Expansion Joint,pipe, cataloged under National Stock Number 4730-01-337-4478, 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 Kadant Unaflex Llc. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-337-4478 |
| Primary Part Number | 1E1BN02.5X6N |
| Item Name | Expansion Joint,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Kadant Unaflex Llc |
| Status | ACTIVE |
| Nominal Pipe Size Designation | 2.500 INCHES IN |
| Design Type | SPOOL |
| End Connection Type | FLANGED |
| Traverse Maximum Length | 0.500 INCHES IN |
| Bolt Hole Diameter | 0.562 INCHES NOMINAL IN |
| Working Pressure Rating | 25.0 POUNDS PER SQUARE INCH (PSI) MINIMUM AND 50.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LBS |
| Bolt Hole Quantity | 6 |
| Bolt Circle Diameter | 4.940 INCHES MINIMUM AND 5.000 INCHES MAXIMUM IN |
| Material | STEEL FLANGE |
| Joint Type | SINGLE |
| 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 |
|---|---|
| 1E1BN02.5X6N PRIMARY | Kadant Unaflex Llc (USA) |
| 1E1BN02.5X6N | Unaflex, Inc. (USA) |
| E15330,CLASS A,TYPE 1 | Unaflex Inc. (USA) |
| Reference | Meaning |
|---|---|
| 23038666 | 7/2 Vendor item drawing reference Rolls-Royce Corporation |
| 1E1BN02.5X6N | 5/9 Secondary reference Unaflex Inc. |
NSN 4730-01-337-4478 is a Expansion Joint,pipe, manufactured by Kadant Unaflex Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-337-4478 has 3 manufacturer part numbers on file: 1E1BN02.5X6N (Kadant Unaflex Llc), 1E1BN02.5X6N (Unaflex, Inc.), E15330,CLASS A,TYPE 1 (Unaflex Inc.).
Key specifications for 1E1BN02.5X6N: Nominal Pipe Size Designation: 2.500 INCHES IN; Design Type: SPOOL; End Connection Type: FLANGED; Traverse Maximum Length: 0.500 INCHES IN. 10 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.