The Valve,ball, cataloged under National Stock Number 4820-01-331-1640, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-331-1640 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES SECOND END |
| Furnished Items and Quantity | 1 HANDWHEEL |
| Nominal Pipe Size Accommodated | 0.500 INCHES FIRST END IN |
| Flange Face Design | PLAIN SECOND END |
| Connection Style | SOCKET FIRST END |
| Bolt Circle Nominal Diameter | 2.438 INCHES SECOND END IN |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Connection Type | FLANGE SECOND END |
| Material Document and Classification | MIL-T-9047 MIL SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Bolt Hole Nominal Diameter | 0.562 INCHES SECOND END IN |
| Maximum Operating Temp | 140.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nominal Outside Diameter | 3.562 INCHES SECOND END IN |
| Bolt Hole Quantity | 3 SECOND END |
| Material | TITANIUM ALLOY FLOW CONTROL DEVICE |
| Valve Operation Method | MANUAL |
| 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 |
|---|---|
| 803-2178492-A | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-331-1640 is a Valve,ball, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-331-1640: Flange Shape: ROUND WITH HOLES SECOND END; Furnished Items and Quantity: 1 HANDWHEEL; Nominal Pipe Size Accommodated: 0.500 INCHES FIRST END IN; Flange Face Design: PLAIN SECOND END. 15 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.