The Coupling Assembly,tube,flexible, cataloged under National Stock Number 4730-01-176-9081, 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 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-176-9081 |
| Primary Part Number | ST7M327-250-256 |
| Item Name | Coupling Assembly,tube,flexible |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Working Temp and Service Type | 160.0 DEG FAHRENHEIT NOMINAL AIR |
| Tube Outside Diameter for Which Designed | 2.500 INCHES NOMINAL IN |
| Criticality Code Justification | FEAT |
| Style Designator | FLEXIBLE COUPLING ASSEMBLY |
| Outside Diameter | 3.170 INCHES NOMINAL IN |
| Material | STEEL COMP 321 |
| Working Pressure and Service Type | 90.0 POUNDS PER SQUARE INCH (PSI) NOMINAL AIR LBS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| ST7M327-250-256 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10163755 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST7M327 | D/9 Drawing number reference only The Boeing Company Div Defense |
| 10A367-250-256 | 5/9 Secondary reference Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc |
NSN 4730-01-176-9081 is a Coupling Assembly,tube,flexible, manufactured by The Boeing Company Div Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-176-9081 has 1 manufacturer part number on file: ST7M327-250-256 (The Boeing Company Div Defense).
Key specifications for ST7M327-250-256: Working Temp and Service Type: 160.0 DEG FAHRENHEIT NOMINAL AIR; Tube Outside Diameter for Which Designed: 2.500 INCHES NOMINAL IN; Criticality Code Justification: FEAT; Style Designator: FLEXIBLE COUPLING ASSEMBLY. 7 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.
NSN 4730-01-176-9081 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.