The Valve,check, cataloged under National Stock Number 4820-01-429-0420, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-429-0420 |
| Primary Part Number | 6300823 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Surface Treatment Document and Classification | MIL-A-8625,TY III,CL 1,.0003 THICK MIN. MIL SPEC SINGLE TREATMENT RESPONSE |
| Connection Style | GROOVED (DROP-IN CARTRIDGE) FIRST END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | UNTHREADED CARTRIDGE ALL ENDS |
| Style Designator | STRAIGHT THRU DROP-IN CARTRIDGE |
| Disk Loading Method | SPRING |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM ALLOY 6061 FLOW CONTROL DEVICE |
| Material | ALUMINUM ALLOY 6061 BODY |
| Opening Pressure Setting | 3.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 6300823 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| CV03-21 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-429-0420 is a Valve,check, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-429-0420 has 1 manufacturer part number on file: 6300823 (Naval Sea Systems Command).
Key specifications for 6300823: Flow Control Device: POPPET; Surface Treatment Document and Classification: MIL-A-8625,TY III,CL 1,.0003 THICK MIN. MIL SPEC SINGLE TREATMENT RESPONSE; Connection Style: GROOVED (DROP-IN CARTRIDGE) FIRST END; Mounting Position: HORIZONTAL OR VERTICAL. 12 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.
NSN 4820-01-429-0420 has DEMIL Code D. 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.