The Valve,restrictor Check, cataloged under National Stock Number 4820-01-445-4692, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hydraforce Inc. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-01-445-4692 |
| Primary Part Number | EC12-40-0-N-100 |
| Item Name | Valve,restrictor Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hydraforce Inc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Style Designator | SCREW-IN CARTRIDGE |
| Operating Pressure | 3500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Disk Loading Method | SPRING |
| Material | STEEL BODY |
| 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 |
|---|---|
| EC12-40-0-N-100 PRIMARY | Hydraforce Inc (USA) |
| DAA7221P152-101 | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| Reference | Meaning |
|---|---|
| DAA7221P152 | D/9 Drawing number reference only Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems |
NSN 4820-01-445-4692 is a Valve,restrictor Check, manufactured by Hydraforce Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-445-4692 has 2 manufacturer part numbers on file: EC12-40-0-N-100 (Hydraforce Inc), DAA7221P152-101 (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems).
Key specifications for EC12-40-0-N-100: Flow Control Device: DISK; Style Designator: SCREW-IN CARTRIDGE; Operating Pressure: 3500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Disk Loading Method: SPRING. 6 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.