The Tee,flange, cataloged under National Stock Number 4730-01-258-5078, 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 Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 28 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-258-5078 |
| Primary Part Number | 70307-63204-041 |
| Item Name | Tee,flange |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Flange Shape | RECTANGULAR WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Flange Face Design | UNABLE TO DECODE |
| Nominal Length | 2.375 INCHES FIRST END IN |
| Nominal Length | 2.375 INCHES SECOND END IN |
| Nominal Length | 3.000 INCHES THIRD END IN |
| Connection Type | FLANGE ALL ENDS |
| Bolt Hole Nominal Diameter | 0.271 INCHES FIRST END IN |
| Bolt Hole Nominal Diameter | 0.271 INCHES SECOND END IN |
| Bolt Hole Nominal Diameter | 0.333 INCHES THIRD END IN |
| Leg Length | 2.250 INCHES NOMINAL SECOND END IN |
| Leg Length | 2.250 INCHES NOMINAL FIRST END IN |
| Leg Length | 2.500 INCHES NOMINAL THIRD END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.812 INCHES FIRST END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.812 INCHES SECOND END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 2.375 INCHES THIRD END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.812 INCHES FIRST ENDUNABLE TO DECODE IN |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.812 INCHES SECOND ENDUNABLE TO DECODE IN |
| Center to Center Nominal Distance Between Bolt Holes Along Width | UNABLE TO DECODE |
| Bolt Hole Quantity | 4 ALL ENDS |
| Nominal Width | 2.375 INCHES FIRST END IN |
| Nominal Width | 2.375 INCHES SECOND END IN |
| Nominal Width | 3.000 INCHES THIRD END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 1.812 INCHES FIRST END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 1.812 INCHES SECOND END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 2.375 INCHES THIRD END IN |
| Material | ALUMINUM ALLOY OVERALL |
| Nominal Thickness | 0.215 INCHES ALL ENDS 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 |
|---|---|
| 70307-63204-041 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| 70307-63204 | D/9 Drawing number reference only Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
NSN 4730-01-258-5078 is a Tee,flange, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-258-5078 has 1 manufacturer part number on file: 70307-63204-041 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for 70307-63204-041: Flange Shape: RECTANGULAR WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Flange Face Design: UNABLE TO DECODE; Nominal Length: 2.375 INCHES FIRST END IN. 28 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.