The Flange,pipe, cataloged under National Stock Number 4730-00-372-4081, 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 Oshkosh Defense Llc. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-372-4081 |
| Primary Part Number | EW52180 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Face Seating Surface Condition | MACHINED |
| Tube Outside Diameter for Which Designed | 1.500 INCHES NOMINAL IN |
| Flange Section Style | PLAIN FACE, LONG NECK |
| Bolt Hole Diameter | 0.281 INCHES NOMINAL IN |
| Neck Height | 0.625 INCHES NOMINAL IN |
| Flange Length | 4.250 INCHES NOMINAL IN |
| Nominal Thread Size | 2.000 INCHES IN |
| Bolt Hole Quantity | 2 |
| Bolt Circle Diameter | 1.719 INCHES NOMINAL IN |
| Screw Thread Series Designator | UNS |
| Surface Treatment | PAINT |
| Flange Width | 2.750 INCHES NOMINAL IN |
| Thread Class | 2B |
| Thread Quantity Per Inch | 10 |
| Material | ALUMINUM |
| Neck Diameter | 2.750 INCHES NOMINAL IN |
| Thickness | 0.125 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 |
| Part Number | Manufacturer |
|---|---|
| EW52180 PRIMARY | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| EW52180 | 5/9 Secondary reference Oshkosh Corp |
NSN 4730-00-372-4081 is a Flange,pipe, manufactured by Oshkosh Defense Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-372-4081 has 1 manufacturer part number on file: EW52180 (Oshkosh Defense Llc).
Key specifications for EW52180: Face Seating Surface Condition: MACHINED; Tube Outside Diameter for Which Designed: 1.500 INCHES NOMINAL IN; Flange Section Style: PLAIN FACE, LONG NECK; Bolt Hole Diameter: 0.281 INCHES NOMINAL IN. 17 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.