The Flange,pipe, cataloged under National Stock Number 4730-01-290-7319, 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 Timken Gears & Services Inc. Div Philadelphia Gear. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-290-7319 |
| Primary Part Number | RGR-421DMX2 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Timken Gears & Services Inc. Div Philadelphia Gear |
| Status | ACTIVE |
| Flange Diameter | 7.775 INCHES NOMINAL IN |
| Nominal Pipe Size for Which Designed | 2.265 INCHES IN |
| Tube Outside Diameter for Which Designed | 4.500 INCHES NOMINAL IN |
| Flange Section Style | PLAIN FACE |
| Style Designator | ROUND, ONE BOLT HOLE CIRCLE |
| Bolt Hole Diameter | 0.641 INCHES NOMINAL IN |
| Bolt Hole Quantity | 8 |
| Bolt Circle Diameter | 6.500 INCHES NOMINAL IN |
| Material | STEEL |
| Thickness | 0.500 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 |
|---|---|
| RGR-421DMX2 | Siemens Energy, Inc. (USA) |
| RGR-421DMX2 PRIMARY | Timken Gears & Services Inc. Div Philadelphia Gear (USA) |
| H-2327 PC 9 | Siemens Energy, Inc. (USA) |
| Reference | Meaning |
|---|---|
| H-2327 | D/9 Drawing number reference only Siemens Energy, Inc. |
NSN 4730-01-290-7319 is a Flange,pipe, manufactured by Timken Gears & Services Inc. Div Philadelphia Gear, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-290-7319 has 3 manufacturer part numbers on file: RGR-421DMX2 (Siemens Energy, Inc.), RGR-421DMX2 (Timken Gears & Services Inc. Div Philadelphia Gear), H-2327 PC 9 (Siemens Energy, Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 3040-01-291-5270, 3010-01-291-5279. Verify interchangeability with system specifications before substitution.
Key specifications for RGR-421DMX2: Flange Diameter: 7.775 INCHES NOMINAL IN; Nominal Pipe Size for Which Designed: 2.265 INCHES IN; Tube Outside Diameter for Which Designed: 4.500 INCHES NOMINAL IN; Flange Section Style: PLAIN FACE. 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.