The Coupling Half,self-Sealing, cataloged under National Stock Number 4730-00-495-4875, 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 20 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-00-495-4875 |
| Primary Part Number | AE73657E |
| Item Name | Coupling Half,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 ALL ENDSFLARED ALL ENDS |
| Bolt Circle Nominal Diameter | 1.437 INCHES IN |
| Mating End Identification | AEROQUIP MFG CO COUPLING HALF,SELF SEALING PART NO.155S1-4DAEROQUIP MFG CO COUPLING HALF,SELF SEALING PART NO.155S1-4D |
| Connection Type | THREADED EXTERNAL TUBE FIRST FLUID END CONNECTIONTHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION |
| Style Designator | MALE COUPLING HALF |
| Bolt Hole Nominal Diameter | 0.201 INCHES IN |
| Operating Pressure | 30000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Mounting Flange Location | FIRST LEGFIRST LEG |
| Features Provided | SELF-SEALINGSELF-SEALING |
| Basic Shape Style | ROUND MOUNTING FLANGEROUND MOUNTING FLANGE |
| Nominal Thread Size | 0.438 INCHES ALL ENDS0.438 INCHES ALL ENDS IN |
| Seat Angle | 37.0 DEGREES LOCATION NOT OTHERWISE SPECIFIED |
| Maximum Operating Temp | 71.1 CELSIUS SINGLE RESPONSE71.1 CELSIUS SINGLE RESPONSE DEGC |
| Nominal Outside Diameter | 1.810 INCHES IN |
| Bolt Hole Quantity | 66 |
| Surface Treatment | ANODIZE BODY |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Thread Class | 3A ALL ENDS3A ALL ENDS A |
| Material | ALUMINUM ALLOY BODY |
| Thread Series Designator | UNF 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 |
|---|---|
| 155S4-4D | Satair A/s (DNK) |
| AE73657E PRIMARY | Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution (USA) |
| AE73657E | Satair A/s (DNK) |
| Reference | Meaning |
|---|---|
| 155S4-4D | 5/9 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
NSN 4730-00-495-4875 is a Coupling Half,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 4730-00-495-4875 has 3 manufacturer part numbers on file: 155S4-4D (Satair A/s), AE73657E (Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution), AE73657E (Satair A/s).
Key specifications for AE73657E: Connection Style: FLARED ALL ENDSFLARED ALL ENDS; Bolt Circle Nominal Diameter: 1.437 INCHES IN; Mating End Identification: AEROQUIP MFG CO COUPLING HALF,SELF SEALING PART NO.155S1-4DAEROQUIP MFG CO COUPLING HALF,SELF SEALING PART NO.155S1-4D; Connection Type: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTIONTHREADED EXTERNAL TUBE FIRST FLUID END CONNECTION. 20 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.