The Coupling,tube, cataloged under National Stock Number 4730-01-531-3314, 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 | 4730-01-531-3314 |
| Primary Part Number | ST7M257-275H200 |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Connection Style | SOCKET (TUBE) ALL ENDS |
| Nominal Overall Length | 2.000 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE ALL ENDS |
| Style Designator | PLAIN W/TAPERED ENDS |
| Material Document and Classification | MIL-T-8808 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 2.750 INCHES ALL ENDS IN |
| Operating Pressure | 45.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 600.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | STEEL COMP 321 OVERALL |
| 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 |
|---|---|
| ST7M257-275H200 PRIMARY | The Boeing Company Div Defense (USA) |
| 10A347-275-200 | Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc (USA) |
NSN 4730-01-531-3314 is a Coupling,tube, manufactured by The Boeing Company Div Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-531-3314 has 2 manufacturer part numbers on file: ST7M257-275H200 (The Boeing Company Div Defense), 10A347-275-200 (Rsa Engineered Products, Llc Dba Rsa Engineered Products Llc).
Key specifications for ST7M257-275H200: Connection Style: SOCKET (TUBE) ALL ENDS; Nominal Overall Length: 2.000 INCHES IN; Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS; Style Designator: PLAIN W/TAPERED ENDS. 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.