The Coupling,tube, cataloged under National Stock Number 4730-01-499-3347, 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 Dh Instruments Inc.. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-01-499-3347 |
| Primary Part Number | 121828 |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Dh Instruments Inc. |
| Status | ACTIVE |
| Connection Style | HIGH PRESSURE FLARE (USED W/ MALE THREADED STYLE NO. 78)(TUBE) ALL ENDS |
| Bolt Circle Nominal Diameter | 1.024 INCHES CENTER BULKHEAD IN |
| Nominal Overall Length | 1.339 INCHES IN |
| Connection Type | THREADED INTERNAL TUBE ALL ENDS |
| Style Designator | THREADED INTERNAL |
| Bolt Hole Nominal Diameter | 0.169 INCHES CENTER BULKHEAD IN |
| Nominal Outside Diameter Tube Accommodated | 0.5625 INCHES ALL ENDS IN |
| Nominal Thread Size | 0.5625 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 2 CENTER BULKHEAD |
| Media for Which Designed | HYDRAULIC FLUID SINGLE RESPONSE |
| Thread Quantity Per Inch | 18 ALL ENDS |
| Material | STEEL COMP 316 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 |
|---|---|
| 121828 PRIMARY | Dh Instruments Inc. (USA) |
| Reference | Meaning |
|---|---|
| U01828 | D/9 Drawing number reference only Dh Instruments Inc. |
NSN 4730-01-499-3347 is a Coupling,tube, manufactured by Dh Instruments Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-499-3347 has 1 manufacturer part number on file: 121828 (Dh Instruments Inc.).
Key specifications for 121828: Connection Style: HIGH PRESSURE FLARE (USED W/ MALE THREADED STYLE NO. 78)(TUBE) ALL ENDS; Bolt Circle Nominal Diameter: 1.024 INCHES CENTER BULKHEAD IN; Nominal Overall Length: 1.339 INCHES IN; Connection Type: THREADED INTERNAL TUBE ALL ENDS. 13 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.