The Nut,tube Coupling, cataloged under National Stock Number 4730-01-151-2570, 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 Kovatch Corp.. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-151-2570 |
| Primary Part Number | K-500-CH-1320 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Kovatch Corp. |
| Status | ACTIVE |
| Length to Shoulder | 0.697 INCHES NOMINAL IN |
| Width Across Flats | 1.000 INCHES NOMINAL IN |
| Thread Series | UNF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.625 INCHES IN |
| Nut Height | 0.960 INCHES NOMINAL IN |
| Nut Style | TUBE COUPLING |
| Thread Class | 2B |
| Thread Quantity Per Inch | 14 |
| Material | STEEL OR COPPER ALLOY OVERALL |
| Fabrication Method | MACHINED |
| Smallest Inside Diameter | 0.800 INCHES NOMINAL IN |
| Nominal Tube Outside Diameter | 0.375 INCHES IN |
| 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 |
|---|---|
| K-500-CH-1320 PRIMARY | Kovatch Corp. (USA) |
| Reference | Meaning |
|---|---|
| 63AX 1721R | 5/2 Secondary reference U.S. Government activity |
| 24710N610 | 5/9 Secondary reference Drivetrain Power & Propulsion Drivetrain Australia Pty Ltd. |
| 9032-24710N610 | 5/9 Secondary reference Volvo Group Government Sales Oceani Oceania Volvo Group Government Sales |
| 24710N610 | 5/9 Secondary reference Drivetrain Australia |
NSN 4730-01-151-2570 is a Nut,tube Coupling, manufactured by Kovatch Corp., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-151-2570 has 1 manufacturer part number on file: K-500-CH-1320 (Kovatch Corp.).
Key specifications for K-500-CH-1320: Length to Shoulder: 0.697 INCHES NOMINAL IN; Width Across Flats: 1.000 INCHES NOMINAL IN; Thread Series: UNF; Thread Direction: RIGHT-HAND. 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.