The Valve,check, cataloged under National Stock Number 4820-00-884-6579, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-884-6579 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Nominal Pipe Size Accommodated | 1.000 INCHES FIRST END IN |
| Connection Style | STREAMLINED WITH ONE BRAZING RING (PIPE) FIRST END |
| Mounting Position | HORIZONTAL |
| Criticality Code Justification | ZZZY |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Style Designator | ANGLE |
| Operating Pressure | 700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Media for Which Designed | WATER, SALT SINGLE RESPONSE |
| Material | NICKEL ALLOY SEAT |
| Material | NICKEL ALLOY BODY |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Reference | Meaning |
|---|---|
| 2621-927-10ASSY1A1INL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2620-927X10ASSYC | 3/1 Design control — primary reference National Oilwell |
| 2621-927-10ASSY1A1IN | 5/9 Secondary reference U.S. Government activity |
| 2620-927X10ASSYC | 5/9 Secondary reference U.S. Government activity |
| 2620-927X10ASSYCL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2621-927-10ASSY1A1IN | 5/1 Secondary reference National Oilwell |
NSN 4820-00-884-6579 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-884-6579: Flow Control Device: DISK; Nominal Pipe Size Accommodated: 1.000 INCHES FIRST END IN; Connection Style: STREAMLINED WITH ONE BRAZING RING (PIPE) FIRST END; Mounting Position: HORIZONTAL. 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 4820-00-884-6579 has DEMIL Code B. 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.