The Valve,ball, cataloged under National Stock Number 4820-01-203-5368, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-203-5368 |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 8.250 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.688 INCHES ALL ENDS IN |
| Operating Pressure | 650.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 5.000 INCHES IN |
| Nominal Outside Diameter | 9.750 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 12 ALL ENDS |
| Face to Face Distance | 16.437 INCHES IN |
| Media for Which Designed | WATER, SALT SINGLE RESPONSE |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | PLASTIC POLYAMIDE NYLON SEAT |
| Material | NICKEL ALLOY BODY |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| Nominal Thickness | 1.500 INCHES ALL ENDS 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 |
|---|---|
| 845-1889799REVD | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 2640-050BSC ASSY A | 3/2 Design control — primary reference U.S. Government activity |
| 2640-050 ASSY A | 3/2 Design control — primary reference U.S. Government activity |
| 845-1889799BSC ASSY A | 5/2 Secondary reference U.S. Government activity |
| 2640-050 ASSEMB | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 2640-050 | D/9 Drawing number reference only U.S. Government activity |
| 845-1889799 | D/9 Drawing number reference only U.S. Government activity |
| 845-1889799 ASSY A | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-203-5368 is a Valve,ball, classified under FSC 4820, Valves, Nonpowered. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-206-0826, 4820-01-291-8631. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-203-5368: Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Bolt Circle Nominal Diameter: 8.250 INCHES ALL ENDS IN; Connection Type: FLANGE ALL ENDS. 17 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.