The Elbow,tube, cataloged under National Stock Number 4730-01-129-0774, 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 18 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-129-0774 |
| Primary Part Number | 7M491A4 |
| Item Name | Elbow,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 LOCKNUT AND 1 TUBE COUPLING NUT |
| Flow Angle | 45.0 DEGREES |
| Connection Style | FLARED (TUBE) SECOND END |
| Connection Style | FLARELESS (TUBE) FIRST END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES SECOND END IN |
| Leg Length | 0.750 INCHES NOMINAL SECOND END IN |
| Leg Length | 1.730 INCHES NOMINAL FIRST END IN |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Surface Treatment | ANODIZE OVERALL |
| Thread Class | 2A SECOND END A |
| Thread Class | 2A FIRST END A |
| Material | ALUMINUM ALLOY OVERALL |
| Thread Series Designator | UNF FIRST END |
| Thread Series Designator | UNF SECOND END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 7M491A4A | Barnetts Office Supplies and Equipment Inc (USA) |
| 7M491A4 PRIMARY | The Boeing Company Div Defense (USA) |
| 7M491A4 | The Boeing Company Div Services (USA) |
| Reference | Meaning |
|---|---|
| A-400-96-0001 | 5/9 Secondary reference Swagelok Co |
| 7M491 | D/9 Drawing number reference only The Boeing Company Div Defense |
| A400-96-4AN | 5/9 Secondary reference Swagelok Co |
NSN 4730-01-129-0774 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 4730-01-129-0774 has 3 manufacturer part numbers on file: 7M491A4A (Barnetts Office Supplies and Equipment Inc), 7M491A4 (The Boeing Company Div Defense), 7M491A4 (The Boeing Company Div Services).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-130-6650. Verify interchangeability with system specifications before substitution.
Key specifications for 7M491A4: Furnished Items and Quantity: 1 LOCKNUT AND 1 TUBE COUPLING NUT; Flow Angle: 45.0 DEGREES; Connection Style: FLARED (TUBE) SECOND END; Connection Style: FLARELESS (TUBE) FIRST END. 18 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.