The Valve,check, cataloged under National Stock Number 4820-01-165-7890, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Kovatch Corp.. Government technical data includes 6 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-165-7890 |
| Primary Part Number | 049-90011-145 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Kovatch Corp. |
| Status | ACTIVE |
| Connection Type | THREADED INTERNAL TUBE FIRST END |
| Style Designator | ANGLE |
| Nominal Outside Diameter Tube Accommodated | 0.625 INCHES FIRST END IN |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.500 INCHES FIRST END IN |
| Thread Series Designator | NPT FIRST END |
| 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 |
|---|---|
| 049-90011-145 | Kovatch Corp. (USA) |
| Reference | Meaning |
|---|---|
| 483144C91 | 5/9 Secondary reference U.S. Government activity |
| BX800376 | 3/2 Design control — primary reference U.S. Government activity |
| 486888C1 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 483005C2 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-165-7890 is a Valve,check, manufactured by Kovatch Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-165-7890 has 1 manufacturer part number on file: 049-90011-145 (Kovatch Corp.).
Key specifications for 049-90011-145: Connection Type: THREADED INTERNAL TUBE FIRST END; Style Designator: ANGLE; Nominal Outside Diameter Tube Accommodated: 0.625 INCHES FIRST END IN; Thread Direction: RIGHT-HAND FIRST END. 6 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.