The Flange,pipe, cataloged under National Stock Number 4730-00-203-0481, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-203-0481 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Diameter | 1.690 INCHES NOMINAL IN |
| Face Seating Surface Condition | MACHINED |
| Tube Outside Diameter for Which Designed | 0.375 INCHES NOMINAL IN |
| Flange Section Style | PLAIN FACE, LONG NECK |
| Style Designator | ROUND, ONE BOLT HOLE CIRCLE |
| Bolt Hole Diameter | 0.141 INCHES NOMINAL IN |
| Neck Height | 0.556 INCHES NOMINAL IN |
| Nominal Thread Size | 0.562 INCHES IN |
| Bolt Hole Quantity | 8 |
| Bolt Circle Diameter | 1.190 INCHES NOMINAL IN |
| Screw Thread Series Designator | UNF |
| Surface Treatment | ANODIZE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | ALUMINUM ALLOY |
| Neck Diameter | 0.554 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN |
| Thickness | 0.160 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 |
| Reference | Meaning |
|---|---|
| BACF22E6 | 3/2 Design control — primary reference U.S. Government activity |
| BACF22E6 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-203-0481 is a Flange,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-203-0481: Flange Diameter: 1.690 INCHES NOMINAL IN; Face Seating Surface Condition: MACHINED; Tube Outside Diameter for Which Designed: 0.375 INCHES NOMINAL IN; Flange Section Style: PLAIN FACE, LONG NECK. 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.