The Elbow,tube, cataloged under National Stock Number 4730-01-147-9312, 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 24 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 6 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-147-9312 |
| Primary Part Number | ST7M263V4 |
| Item Name | Elbow,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Flow Angle | 90.0 DEGREES |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE NUT |
| Connection Style | FLARED (TUBE) SECOND END |
| Connection Style | SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Material Document and Classification | QQ-A-225/6,2024,T6 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-A-225/6,2024,T851 FED SPEC SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | QQ-A-367,2014,T6 FED SPEC SINGLE MATERIAL RESPONSE ELBOW |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES ALL ENDS IN |
| Leg Length | 1.578 INCHES NOMINAL SECOND END IN |
| Leg Length | 0.600 INCHES NOMINAL FIRST END IN |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Nominal Thread Size | 0.438 INCHES SECOND END BULKHEAD IN |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Specification/standard Data | 81349-MIL-F-5509 GOVERNMENT SPECIFICATION |
| Surface Treatment | ANODIZE NUT |
| Surface Treatment | CHROMATE ELBOW |
| Thread Class | 3A SECOND END BULKHEAD A |
| Thread Class | 3A SECOND END A |
| Thread Class | 3B FIRST END |
| Material | ALUMINUM ALLOY NUT |
| Material | ALUMINUM ALLOY ELBOW |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) SECOND END BULKHEAD |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) 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 |
|---|---|
| ST7M263V4 | Nelson Aero Space, Inc. (USA) |
| ST7M263V4 | Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company (USA) |
| ST7M263V4 PRIMARY | The Boeing Company Div Defense (USA) |
| ST7M263V4 | Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply (USA) |
| ST7M263V4 | Sps Technologies, Llc Dba Airdrome Precision Components (USA) |
| ST7M263V4 | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| Reference | Meaning |
|---|---|
| MIL-F-5509 | 4/1 Identification reference U.S. Government activity |
| ST7M263V4 | 5/9 Secondary reference Cal Fittings Inc |
| ST7M263V4 | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| ST7M263 | D/9 Drawing number reference only The Boeing Company Div Defense |
| 10108774 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 4730-01-147-9312 is a Elbow,tube, manufactured by The Boeing Company Div Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-147-9312 has 6 manufacturer part numbers on file: ST7M263V4 (Nelson Aero Space, Inc.), ST7M263V4 (Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company), ST7M263V4 (The Boeing Company Div Defense), ST7M263V4 (Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply), ST7M263V4 (Sps Technologies, Llc Dba Airdrome Precision Components) and 1 more.
6 possible matches (shared part number, not a government interchangeability claim): 4730-01-148-2757, 4730-01-184-2063, 4730-01-233-0774. Verify interchangeability with system specifications before substitution.
Key specifications for ST7M263V4: Flow Angle: 90.0 DEGREES; Surface Treatment Document and Classification: MIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE NUT; Connection Style: FLARED (TUBE) SECOND END; Connection Style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END FIRST END. 24 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.