The Valve,check, cataloged under National Stock Number 4820-01-656-2043, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker Hannifin Corp Dba Pneutronics. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Parker Hannifin Corp Dba Pneutronics (CAGE 26433) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-656-2043 |
| Primary Part Number | E6-254-1 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker Hannifin Corp Dba Pneutronics |
| Status | ACTIVE |
| 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 |
|---|---|
| E6-254-1 | Parker Hannifin Corp Dba Pneutronics (USA) |
| Reference | Meaning |
|---|---|
| 8C1031-1 | 3/2 Design control — primary reference U.S. Government activity |
| 2GFV00901-0012 | 5/2 Secondary reference U.S. Government activity |
| E6-254-1 | 5/2 Secondary reference U.S. Government activity |
| 2GFV00901-0012 | 5/9 Secondary reference Bae Systems |
| E6-254-1 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-656-2043 is a Valve,check, manufactured by Parker Hannifin Corp Dba Pneutronics, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-656-2043 has 1 manufacturer part number on file: E6-254-1 (Parker Hannifin Corp Dba Pneutronics).
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.