The Valve,check, cataloged under National Stock Number 4820-01-481-4939, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-481-4939 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 3.000 INCHES ALL ENDS IN |
| 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 |
| Reference | Meaning |
|---|---|
| NB01620AE/31N | 3/9 Design control — primary reference Pima Valve, Llc |
| 57-001 ASSY NB01620AE/3IN | C/1 Advisory reference — outside the item-of-supply concept Hunt Valve Company, Inc. |
| NB01620AE/3IN | C/1 Advisory reference — outside the item-of-supply concept Pima Valve, Llc |
| 57-001 ASSY NB01620AE/3IN | 5/9 Secondary reference Pima Valve, Llc |
| NB01620AE/31N | C/1 Advisory reference — outside the item-of-supply concept Hunt Valve Company, Inc. |
NSN 4820-01-481-4939 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-481-4939: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 3.000 INCHES ALL ENDS IN; Valve Operation Method: AUTOMATIC. 3 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.