The Expansion Joint,pipe, cataloged under National Stock Number 4730-01-274-0804, 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 Unaflex Inc.. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-274-0804 |
| Primary Part Number | 800-USA-2 |
| Item Name | Expansion Joint,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Unaflex Inc. |
| Status | ACTIVE |
| Nominal Pipe Size Designation | 2.500 INCHES IN |
| End Connection Type | FLANGED |
| Working Pressure Rating | 225.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Bolt Hole Quantity | 4 |
| Bolt Circle Diameter | 5.500 INCHES NOMINAL IN |
| Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Surface Treatment | CADMIUM FLANGE |
| Material | STEEL FLANGE |
| Flange Outside Diameter | 7.000 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4730-01-274-0804 is a Expansion Joint,pipe, manufactured by Unaflex Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-274-0804 has 2 manufacturer part numbers on file: 800-USA-2 (Unaflex Inc.), 3258421-2 (Naval Sea Systems Command).
Key specifications for 800-USA-2: Nominal Pipe Size Designation: 2.500 INCHES IN; End Connection Type: FLANGED; Overall Length: 4.500 INCHES NOMINAL IN; Working Pressure Rating: 225.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS. 9 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.