The Union,tube, cataloged under National Stock Number 4730-01-356-8646, 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 Oshkosh Defense Llc. Government technical data includes 20 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-356-8646 |
| Primary Part Number | 1890800 |
| Item Name | Union,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) SECOND END |
| Connection Style | PLAIN (TUBE) FIRST END |
| Union Joint Location | FIRST END |
| Coupling Flange Shape | ROUND |
| Nominal Overall Length | 3.687 INCHES IN |
| Criticality Code Justification | FEAT |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Style Designator | SCREWED |
| Nominal Outside Diameter Tube Accommodated | 1.000 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 1.000 INCHES FIRST END IN |
| Operating Pressure | 5625.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Seat Type | GASKET |
| Nominal Thread Size | 1.000 INCHES FIRST END BULKHEAD IN |
| Seat Angle | 37.0 DEGREES SECOND END |
| Surface Treatment | ZINC OVERALL |
| Media for Which Designed | HYDRAULIC FLUID SINGLE RESPONSE |
| Thread Class | 2B FIRST END BULKHEAD |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF FIRST END BULKHEAD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| A16-17JBHR | Primary Fluid Power Ltd (GBR) |
| 1890800 PRIMARY | Oshkosh Defense Llc (USA) |
| KRA16-17J1CBHR | Primary Fluid Power Ltd (GBR) |
| Reference | Meaning |
|---|---|
| A16-17J1CBHR | 5/9 Secondary reference Primary Fluid Power Ltd |
| 1890800 | 5/9 Secondary reference Oshkosh Corp |
NSN 4730-01-356-8646 is a Union,tube, manufactured by Oshkosh Defense Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-356-8646 has 3 manufacturer part numbers on file: A16-17JBHR (Primary Fluid Power Ltd), 1890800 (Oshkosh Defense Llc), KRA16-17J1CBHR (Primary Fluid Power Ltd).
Key specifications for 1890800: Connection Style: FLARED (TUBE) SECOND END; Connection Style: PLAIN (TUBE) FIRST END; Union Joint Location: FIRST END; Coupling Flange Shape: ROUND. 20 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.