The Coupling,tube, cataloged under National Stock Number 4730-01-299-8574, 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 Austin-Westran Llc. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Coupling,tube |
| FSC / FSG | 4730 — Hose, Pipe, Tube, Lubrication, and Railing Fittings (FSG 47) |
| Manufacturers | Austin-Westran Llc (CAGE 24234) |
| Parameter | Value |
|---|---|
| NSN | 4730-01-299-8574 |
| Primary Part Number | 405531 |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Austin-Westran Llc |
| Status | ACTIVE |
| Connection Style | FLARELESS (TUBE) ALL ENDS |
| Nominal Overall Length | 2.110 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | RIGID, WRENCHING FACILITIES EACH END |
| Nominal Outside Diameter Tube Accommodated | 0.339 INCHES ALL ENDS IN |
| Nominal Thread Size | 0.625 INCHES ALL ENDS IN |
| Seat Angle | 0.01 RADIANS ALL ENDS |
| Maximum Operating Temp | 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Thread Class | 2A ALL ENDS A |
| Material | COPPER ALLOY OVERALL |
| 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 |
|---|---|
| 405531 PRIMARY | Austin-Westran Llc (USA) |
| Reference | Meaning |
|---|---|
| 10526458 | 7/2 Vendor item drawing reference General Dynamics Land Systems Canadacorp |
NSN 4730-01-299-8574 is a Coupling,tube, manufactured by Austin-Westran Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-299-8574 has 1 manufacturer part number on file: 405531 (Austin-Westran Llc).
Key specifications for 405531: Connection Style: FLARELESS (TUBE) ALL ENDS; Nominal Overall Length: 2.110 INCHES IN; Connection Type: THREADED EXTERNAL TUBE ALL ENDS; Style Designator: RIGID, WRENCHING FACILITIES EACH END. 11 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.