The Flange,pipe, cataloged under National Stock Number 4730-01-137-0381, 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 10 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-137-0381 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Face Seating Surface Condition | MACHINED |
| Nominal Pipe Size for Which Designed | 0.750 INCHES IN |
| Flange Section Style | RAISED FACE SOCKET NECK (BULK HEAD) |
| Style Designator | SQUARE, ONE BOLT HOLE CIRCLE |
| Material Document and Classification | QQ-S-763,CL 304,CONDITION A FED SPEC SINGLE MATERIAL RESPONSE |
| Features Provided | O RING |
| Bolt Hole Quantity | 4 |
| Bolt Circle Diameter | 0.750 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| Furnished Items | SCREW |
| 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 |
|---|---|
| 2621-228-02 | D/9 Drawing number reference only U.S. Government activity |
| 2621-228-02ASSY67 | 3/2 Design control — primary reference U.S. Government activity |
| 845-4687676 | D/9 Drawing number reference only U.S. Government activity |
| 845-4687676ASSY67 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-137-0381 is a Flange,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-137-0381: Face Seating Surface Condition: MACHINED; Nominal Pipe Size for Which Designed: 0.750 INCHES IN; Flange Section Style: RAISED FACE SOCKET NECK (BULK HEAD); Style Designator: SQUARE, ONE BOLT HOLE CIRCLE. 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.