The Valve,ball, cataloged under National Stock Number 4820-01-206-0826, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-206-0826 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES FIRST END |
| Flange Face Design | PLAIN FIRST END |
| Bolt Circle Nominal Diameter | 10.875 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 8.563 INCHES SECOND END IN |
| Connection Type | FLANGE FIRST END |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Material Document and Classification | QQ-N-288, COMP E FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Bolt Hole Nominal Diameter | 1.313 INCHES FIRST END IN |
| Bolt Hole Nominal Diameter | 0.938 INCHES SECOND END IN |
| Operating Pressure | 650.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 5.000 INCHES IN |
| Second Connection Face to Centerline Distance | 10.375 INCHES IN |
| Nominal Outside Diameter | 10.438 INCHES SECOND END IN |
| Nominal Outside Diameter | 15.500 INCHES FIRST END IN |
| Bolt Hole Quantity | 10 SECOND END |
| Bolt Hole Quantity | 8 FIRST END |
| Media for Which Designed | WATER, SALT SINGLE RESPONSE |
| First Connection Face to Centerline Distance | 16.937 INCHES IN |
| Material | NICKEL ALLOY BODY |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| Nominal Thickness | 1.625 INCHES SECOND END IN |
| Nominal Thickness | 2.000 INCHES FIRST END IN |
| 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 |
|---|---|
| SS845-1889799 | D/9 Drawing number reference only U.S. Government activity |
| 2640-050 | D/9 Drawing number reference only U.S. Government activity |
| SS845-1889799 ASSEMBLY D | 5/2 Secondary reference U.S. Government activity |
| 845-1889799ASSY | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 2640-050 ASSEMBLY D | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-206-0826 is a Valve,ball, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-291-8631. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-206-0826: Flange Shape: ROUND WITH HOLES FIRST END; Flange Face Design: PLAIN FIRST END; Bolt Circle Nominal Diameter: 10.875 INCHES FIRST END IN; Bolt Circle Nominal Diameter: 8.563 INCHES SECOND END IN. 22 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.