The Union,tube, cataloged under National Stock Number 4730-01-540-0073, 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 Air-Way Manufacturing Company. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-540-0073 |
| Primary Part Number | F2403-10-8-O |
| Item Name | Union,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Air-Way Manufacturing Company |
| Status | ACTIVE |
| Flange Face Design | PLAIN ALL ENDS |
| Connection Style | FLARED W/ GASKET SEAT (TUBE) ALL ENDS |
| Nominal Overall Length | 1.780 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | THREADED |
| Nominal Outside Diameter Tube Accommodated | 0.625 INCHES ALL ENDS IN |
| Nominal Thread Size | 0.750 INCHES SECOND END IN |
| Nominal Thread Size | 0.875 INCHES FIRST END IN |
| Surface Treatment | CHROMATE ZINC UNION |
| Media for Which Designed | WATER SINGLE RESPONSE |
| Thread Class | 2A SECOND END A |
| Thread Class | 2A FIRST END A |
| Thread Quantity Per Inch | 16 SECOND END |
| Thread Quantity Per Inch | 14 FIRST END |
| Material | STEEL UNION |
| Thread Series Designator | UNF 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 |
|---|---|
| F2403-10-8-O PRIMARY | Air-Way Manufacturing Company (USA) |
| 10665093-001 | General Dynamics Land Systems Canadacorp (CAN) |
| Reference | Meaning |
|---|---|
| F2403-10-8-O | 5/9 Secondary reference Quality Assured Castings Andcomponents Ltd |
NSN 4730-01-540-0073 is a Union,tube, manufactured by Air-Way Manufacturing Company, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-540-0073 has 2 manufacturer part numbers on file: F2403-10-8-O (Air-Way Manufacturing Company), 10665093-001 (General Dynamics Land Systems Canadacorp).
Key specifications for F2403-10-8-O: Flange Face Design: PLAIN ALL ENDS; Connection Style: FLARED W/ GASKET SEAT (TUBE) ALL ENDS; Nominal Overall Length: 1.780 INCHES IN; Connection Type: THREADED EXTERNAL TUBE ALL ENDS. 16 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.