The Valve,check, cataloged under National Stock Number 4820-00-894-1052, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Inventory Control Point Mechanicsburg. Government technical data includes 11 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through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-894-1052 |
| Primary Part Number | 845-1889571ASSYAL1 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Renewable Seat Ring Type | PRESSED-IN |
| Nominal Pipe Size Accommodated | 0.500 INCHES FIRST END IN |
| Connection Style | SOCKET (PIPE) FIRST END |
| Criticality Code Justification | ZZZY |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Style Designator | STRAIGHT THRU |
| Disk Loading Method | SPRING |
| Surface Treatment | PASSIVATE |
| Valve Operation Method | AUTOMATIC |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW NAVSEA 0948-LP-045-7010 MATERIAL CONTROL STANDARD FOR LEVEL I 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 |
| Part Number | Manufacturer |
|---|---|
| 845-1889571ASSYAL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| C29653-1-2INL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| SS845-1889571ASSYA1-2IN | 3/1 Design control — primary reference U.S. Government activity |
| 2620-908X4ASSYA1-2IN | 5/9 Secondary reference U.S. Government activity |
| 2620-908X4ASSYA1-2INL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2620-908X4ASSA1 -2IN | 5/1 Secondary reference U.S. Government activity |
| SS845-1889571ASSYA1-2IN | 5/1 Secondary reference Eaton Corporation Dba Eaton Inoac Div Eaton |
| E17250ASSYA1-2IN | 5/1 Secondary reference Eaton Corporation Dba Eaton Inoac Div Eaton |
| C29653-1-2IN | 5/1 Secondary reference Eaton Corporation Dba Eaton Inoac Div Eaton |
| SS845-1889571ASSYA1-2INL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 2620-908X4ASSA1-2INL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| E17250ASSYA1-2INL1 | 5/1 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 845-1889571ASSYA | 5/1 Secondary reference U.S. Government activity |
NSN 4820-00-894-1052 is a Valve,check, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-894-1052 has 1 manufacturer part number on file: 845-1889571ASSYAL1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 845-1889571ASSYAL1: Flow Control Device: DISK; Renewable Seat Ring Type: PRESSED-IN; Nominal Pipe Size Accommodated: 0.500 INCHES FIRST END IN; Connection Style: SOCKET (PIPE) FIRST END. 11 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 4820-00-894-1052 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.