The Valve,check, cataloged under National Stock Number 4820-01-346-1647, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Jlg Industries, Inc.. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-346-1647 |
| Primary Part Number | P28266 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Jlg Industries, Inc. |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | FLARELESS SECOND END |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END |
| Mounting Position | HORIZONTAL |
| Connection Type | THREADED EXTERNAL BOSS FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Style Designator | STRAIGHT THRU |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Nominal Thread Size | 0.875 INCHES SECOND END IN |
| Seat Angle | 24.0 DEGREES SECOND END |
| Seat Angle | 37.0 DEGREES FIRST END |
| Disk Loading Method | SPRING |
| Thread Class | 3A ALL ENDS A |
| Material | STEEL BODY |
| Thread Series Designator | UNF ALL ENDS |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| P28266 PRIMARY | Jlg Industries, Inc. (USA) |
| Reference | Meaning |
|---|---|
| P28266 | 3/9 Design control — primary reference Lull Lift Corp Dba Omniquip Parts Worldwide |
NSN 4820-01-346-1647 is a Valve,check, manufactured by Jlg Industries, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-346-1647 has 1 manufacturer part number on file: P28266 (Jlg Industries, Inc.).
Key specifications for P28266: Flow Control Device: DISK; Connection Style: FLARELESS SECOND END; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END; Mounting Position: HORIZONTAL. 17 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.