The Valve,ball, cataloged under National Stock Number 4820-01-233-4973, 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17 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-233-4973 |
| 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 | 2.438 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | CROSS FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.193 INCHES ALL ENDS IN |
| Operating Pressure | 490.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 2.500 INCHES IN |
| Bonnet Type | PACKING RETAINING |
| Nominal Outside Diameter | 5.500 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 4 ALL ENDS |
| Face to Face Distance | 13.250 INCHES IN |
| First Connection Face to Centerline Distance | 10.312 INCHES IN |
| Material | ALUMINUM ALLOY SEAT |
| Material | NICKEL ALLOY BODY |
| Valve Operation Method | MANUAL |
| Nominal Thickness | 0.125 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 |
|---|---|
| 77791-25X1 | D/9 Drawing number reference only U.S. Government activity |
| 516-2159966 | D/9 Drawing number reference only U.S. Government activity |
| 77791-25X1 ASSY AC LESS TAILPIEC | 3/1 Design control — primary reference U.S. Government activity |
| 516-2159966 AY AC LESS TAILPIECE | 5/2 Secondary reference U.S. Government activity |
NSN 4820-01-233-4973 is a Valve,ball, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-233-4973: Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Bolt Circle Nominal Diameter: 2.438 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.