The Coupling Half,self-Sealing, cataloged under National Stock Number 4730-01-725-1355, 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 The Boeing Company Div Defense. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-725-1355 |
| Primary Part Number | 7M1257-12R |
| Item Name | Coupling Half,self-Sealing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Connection Style | FLARED FIRST FLUID END CONNECTION |
| Connection Type | THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION |
| Style Designator | MALE COUPLING HALF |
| Material Document and Classification | AMS5643 NATIONAL STD SINGLE MATERIAL RESPONSE BODY |
| Operating Pressure | 1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 1.546 INCHES MINIMUM AND 1.578 INCHES MAXIMUM IN |
| Maximum Operating Temp | 275.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Surface Treatment | PASSIVATE BODY |
| Material | STEEL CORROSION RESISTING BODY |
| 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 |
|---|---|
| 7M1257-12R PRIMARY | The Boeing Company Div Defense (USA) |
| AE77574K PRIMARY | Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution (USA) |
NSN 4730-01-725-1355 is a Coupling Half,self-Sealing, manufactured by The Boeing Company Div Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-725-1355 has 2 manufacturer part numbers on file: 7M1257-12R (The Boeing Company Div Defense), AE77574K (Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution).
Key specifications for 7M1257-12R: Connection Style: FLARED FIRST FLUID END CONNECTION; Connection Type: THREADED EXTERNAL TUBE FIRST FLUID END CONNECTION; Style Designator: MALE COUPLING HALF; Material Document and Classification: AMS5643 NATIONAL STD SINGLE MATERIAL RESPONSE BODY. 9 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.