The Valve,check, cataloged under National Stock Number 4820-00-333-6723, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Eaton Corporation Dba Eaton Inoac Div Eaton. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Eaton Corporation Dba Eaton Inoac Div Eaton (CAGE 77842); Essex Industries, Inc. Dba Essex Industries (CAGE 55469) |
| Parameter | Value |
|---|---|
| NSN | 4820-00-333-6723 |
| Primary Part Number | 365256 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Eaton Corporation Dba Eaton Inoac Div Eaton |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 365256 | Eaton Corporation Dba Eaton Inoac Div Eaton (USA) |
| 365256 | Essex Industries, Inc. Dba Essex Industries (USA) |
| Reference | Meaning |
|---|---|
| 365256 | 1/2 Source control — Government-approved source U.S. Government activity |
| 365256-1 | 5/9 Secondary reference U.S. Government activity |
| 2C9668 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-333-6723 is a Valve,check, manufactured by Eaton Corporation Dba Eaton Inoac Div Eaton, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-333-6723 has 2 manufacturer part numbers on file: 365256 (Eaton Corporation Dba Eaton Inoac Div Eaton), 365256 (Essex Industries, Inc. Dba Essex Industries).
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4820-00-333-6723 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.