The Ball,check, cataloged under National Stock Number 4820-01-442-1880, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-442-1880 |
| Item Name | Ball,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Spherical Diameter | 0.500 INCHES NOMINAL IN |
| Valve Design Control Activity | 63705 |
| Pressure Class | ERR-060 |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| D-WK-492-A71 PC11-9 | 3/2 Design control — primary reference U.S. Government activity |
| D-WK-492-A71 PI | C/1 Advisory reference — outside the item-of-supply concept Walz and Krenzer Inc |
| D-WK-492-A71 | D/9 Drawing number reference only Walz and Krenzer Inc |
| D-WK-492-A71 PC11-9 | 3/9 Design control — primary reference Walz and Krenzer Inc |
NSN 4820-01-442-1880 is a Ball,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-442-1880: Spherical Diameter: 0.500 INCHES NOMINAL IN; Special Features: COMPONENT OF SAFETY RELIEF VALVE,NSN 4820-01-298-5240; Valve Design Control Activity: 63705; End Item Identification: STRATEGIC SEALIFT CONVERSION SHIPS CLASS. 4 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.