The Coupling Assembly,self-Sealing, cataloged under National Stock Number 4730-00-277-4769, 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 Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-00-277-4769 |
| Primary Part Number | 140-4D |
| Item Name | Coupling Assembly,self-Sealing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| Status | ACTIVE |
| Connection Style | FLARED FIRST QUICK DISCONNECT END |
| Bolt Circle Nominal Diameter | 1.438 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE FIRST QUICK DISCONNECT END |
| Style Designator | COUPLING ASSEMBLY |
| Bolt Hole Nominal Diameter | 0.188 INCHES IN |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST QUICK DISCONNECT END IN |
| Operating Pressure | 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Second End Relationship with First End | IDENTICAL |
| Mounting Flange Location | FIRST LEG |
| Features Provided | SELF-SEALING |
| Basic Shape Style | ROUND MOUNTING FLANGE |
| Nominal Thread Size | 0.438 INCHES FIRST QUICK DISCONNECT END IN |
| Seat Angle | 37.0 DEGREES |
| Nominal Outside Diameter | 1.810 INCHES IN |
| Bolt Hole Quantity | 6 |
| Surface Treatment | CADMIUM BODY |
| Thread Class | 3A FIRST QUICK DISCONNECT END A |
| Material | STEEL BODY |
| Thread Series Designator | UNF FIRST QUICK DISCONNECT END |
| 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 |
|---|---|
| 140-4D PRIMARY | Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution (USA) |
| 1628A81018 PRIMARY | Lockheed Martin Corporation Div Rotary and Mission Systems (USA) |
| Reference | Meaning |
|---|---|
| AN6242-4 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-00-277-4769 is a Coupling Assembly,self-Sealing, manufactured by Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-277-4769 has 2 manufacturer part numbers on file: 140-4D (Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution), 1628A81018 (Lockheed Martin Corporation Div Rotary and Mission Systems).
Key specifications for 140-4D: Connection Style: FLARED FIRST QUICK DISCONNECT END; Bolt Circle Nominal Diameter: 1.438 INCHES IN; Connection Type: THREADED EXTERNAL TUBE FIRST QUICK DISCONNECT END; Style Designator: COUPLING ASSEMBLY. 19 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.