The Elbow,flange to Tube, cataloged under National Stock Number 4730-01-031-3288, 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 Northrop Grumman Systems Corporation. Government technical data includes 17 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-031-3288 |
| Primary Part Number | A51P30105-9 |
| Item Name | Elbow,flange to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES SECOND END |
| Flow Angle | 45.0 DEGREES |
| Flange Face Design | PLAIN SECOND END |
| Connection Style | SHOULDERED (GASKET) (TUBE) FIRST END |
| Bolt Circle Nominal Diameter | 4.125 INCHES SECOND END IN |
| Tubing Wall Nominal Thickness for Which Designed | 0.049 INCHES FIRST END IN |
| Connection Type | FLANGE SECOND END |
| Connection Type | UNTHREADED EXTERNAL TUBE FIRST END |
| Bolt Hole Nominal Diameter | 0.250 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 3.500 INCHES FIRST END IN |
| Leg Length | 3.250 INCHES NOMINAL FIRST END IN |
| Leg Length | 2.438 INCHES NOMINAL SECOND END IN |
| Nominal Outside Diameter | 5.093 INCHES SECOND END IN |
| Bolt Hole Quantity | 6 SECOND END |
| Surface Treatment | ANODIZE FLANGE |
| Material | ALUMINUM ALLOY OVERALL |
| Nominal Thickness | 0.218 INCHES SECOND END 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 |
|---|---|
| A51P30105-9 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51P30105-9 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| A51P30105-9 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 4730-01-031-3288 is a Elbow,flange to Tube, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-031-3288 has 1 manufacturer part number on file: A51P30105-9 (Northrop Grumman Systems Corporation).
Key specifications for A51P30105-9: Flange Shape: ROUND WITH HOLES SECOND END; Flow Angle: 45.0 DEGREES; Flange Face Design: PLAIN SECOND END; Connection Style: SHOULDERED (GASKET) (TUBE) FIRST END. 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.