The Coupling Half,self-Sealing, cataloged under National Stock Number 4730-00-103-4873, 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 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-00-103-4873 |
| Primary Part Number | C3090-0-16 |
| Item Name | Coupling Half,self-Sealing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Connection Style | FLARELESS ALL ENDS |
| Bolt Circle Nominal Diameter | 2.375 INCHES IN |
| Style Designator | MALE COUPLING HALF |
| Bolt Hole Nominal Diameter | 0.201 INCHES IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Features Provided | SELF-SEALING |
| Nominal Thread Size | 1.312 INCHES ALL ENDS IN |
| Seat Angle | 12.0 DEGREES LOCATION NOT OTHERWISE SPECIFIED |
| Nominal Outside Diameter | 2.620 INCHES IN |
| Bolt Hole Quantity | 6 |
| Surface Treatment | ANODIZE BODY |
| Thread Class | 3A ALL ENDS A |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | ALUMINUM ALLOY BODY |
| Thread Series Designator | UN ALL ENDS |
| 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 |
|---|---|
| C3090-0-16 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
| Reference | Meaning |
|---|---|
| C3090-0-16 | 5/9 Secondary reference Ozone Aircraft Components Div of Ozone Industries Inc |
NSN 4730-00-103-4873 is a Coupling Half,self-Sealing, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-103-4873 has 1 manufacturer part number on file: C3090-0-16 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for C3090-0-16: Connection Style: FLARELESS ALL ENDS; Bolt Circle Nominal Diameter: 2.375 INCHES IN; Style Designator: MALE COUPLING HALF; Overall Length: 3.865 INCHES NOMINAL IN. 15 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.