The Flange,pipe, cataloged under National Stock Number 4730-01-299-5730, 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 Buckeye Forge Inc. Government technical data includes 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-299-5730 |
| Primary Part Number | 603-M |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Buckeye Forge Inc |
| Status | ACTIVE |
| Flange Diameter | 5.812 INCHES NOMINAL IN |
| Face Seating Surface Condition | GROUND |
| Nominal Pipe Size for Which Designed | 4.000 INCHES IN |
| Flange Section Style | RAISED FACE, RAISED NECK |
| Style Designator | ROUND, NO BOLT HOLES |
| Neck Height | 0.906 INCHES NOMINAL IN |
| Nominal Thread Size | 4.000 INCHES IN |
| Specification/standard Data | 80204-B16.5 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Nondefinitive Spec/std Data | 4.000 IN. SIZE IN |
| Raised Face Diameter | 4.719 INCHES NOMINAL IN |
| Raised Face Height | 0.188 INCHES NOMINAL IN |
| Screw Thread Series Designator | NPT |
| Material | STEEL |
| 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 |
|---|---|
| 603-M PRIMARY | Buckeye Forge Inc (USA) |
| Reference | Meaning |
|---|---|
| B16.5 | 5/1 Secondary reference U.S. Government activity |
| 510360-3 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-299-5730 is a Flange,pipe, manufactured by Buckeye Forge Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-299-5730 has 1 manufacturer part number on file: 603-M (Buckeye Forge Inc).
Key specifications for 603-M: Flange Diameter: 5.812 INCHES NOMINAL IN; Face Seating Surface Condition: GROUND; Nominal Pipe Size for Which Designed: 4.000 INCHES IN; Flange Section Style: RAISED FACE, RAISED NECK. 14 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.