The Flange,pipe, cataloged under National Stock Number 4730-00-438-0655, 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 14 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-438-0655 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Socket Diameter | 8.625 INCHES MINIMUM AND 8.632 INCHES MAXIMUM IN |
| Flange Diameter | 12.375 INCHES NOMINAL IN |
| Face Seating Surface Condition | MACHINED |
| Flange Section Style | PLAIN FACE, SOCKET BRAZING NECK |
| Style Designator | ROUND, ONE BOLT HOLE CIRCLE |
| Bolt Hole Diameter | 0.688 INCHES NOMINAL IN |
| Neck Height | 1.313 INCHES MINIMUM AND 1.438 INCHES MAXIMUM IN |
| Reducer Flange Hole Type | CONCENTRIC |
| Bolt Hole Quantity | 14 |
| Bolt Circle Diameter | 11.062 INCHES NOMINAL IN |
| Bore Diameter | 8.000 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Furnished Items | GASKET |
| Thickness | 1.312 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 |
|---|---|
| 514908-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-438-0655 is a Flange,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-438-0655: Socket Diameter: 8.625 INCHES MINIMUM AND 8.632 INCHES MAXIMUM IN; Flange Diameter: 12.375 INCHES NOMINAL IN; Face Seating Surface Condition: MACHINED; Flange Section Style: PLAIN FACE, SOCKET BRAZING 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.