The Coupling Body,tube, cataloged under National Stock Number 4730-01-129-5385, 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 Northrop Grumman Systems Corporation. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 4730-01-129-5385 |
| Primary Part Number | GS531E300A |
| Item Name | Coupling Body,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Tube Outside Diameter for Which Designed | 3.000 INCHES NOMINAL IN |
| Style Designator | FLEXIBLE COUPLING BODY |
| Outside Diameter | 3.562 INCHES MINIMUM AND 3.600 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Thread Size | 3-1/2-16 |
| Screw Thread Series Designator | UN |
| Surface Treatment | ANODIZE |
| Thread Class | 2A A |
| Material | ALUMINUM ALLOY 2024 |
| 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 |
|---|---|
| GS531E300A PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| T22-300 | 5/9 Secondary reference Eaton Aviation Corporation |
NSN 4730-01-129-5385 is a Coupling Body,tube, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-129-5385 has 1 manufacturer part number on file: GS531E300A (Northrop Grumman Systems Corporation).
Key specifications for GS531E300A: Tube Outside Diameter for Which Designed: 3.000 INCHES NOMINAL IN; Style Designator: FLEXIBLE COUPLING BODY; Overall Length: 1.260 INCHES MINIMUM AND 1.280 INCHES MAXIMUM IN; Outside Diameter: 3.562 INCHES MINIMUM AND 3.600 INCHES MAXIMUM IN. 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.