The Valve,check, cataloged under National Stock Number 4820-01-505-8766, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Engine Systems, Inc.. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Valve,check |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Engine Systems, Inc. (CAGE 16505) |
| Parameter | Value |
|---|---|
| NSN | 4820-01-505-8766 |
| Primary Part Number | 412C-1-140 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Engine Systems, Inc. |
| Status | ACTIVE |
| 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 |
|---|---|
| 412C-1-140 PRIMARY | Engine Systems, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 412C-1-140 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4820-01-505-8766 is a Valve,check, manufactured by Engine Systems, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-505-8766 has 1 manufacturer part number on file: 412C-1-140 (Engine Systems, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-505-8788. Verify interchangeability with system specifications before substitution.
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.