The Valve,exhaust Control, cataloged under National Stock Number 4820-01-118-2530, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 28 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-118-2530 |
| Item Name | Valve,exhaust Control |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES FIRST END |
| Flange Shape | ROUND WITH HOLES SECOND END |
| Flange Shape | ROUND WITH HOLES THIRD END |
| Flange Face Design | PLAIN FIRST END |
| Flange Face Design | PLAIN SECOND END |
| Flange Face Design | PLAIN THIRD END |
| Bolt Circle Nominal Diameter | 5.500 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 5.500 INCHES SECOND END IN |
| Bolt Circle Nominal Diameter | 4.437 INCHES THIRD END IN |
| Connection Type | FLANGE SECOND END |
| Connection Type | FLANGE FIRST END |
| Connection Type | FLANGE THIRD END |
| Bolt Hole Nominal Diameter | 0.562 INCHES THIRD END IN |
| Bolt Hole Nominal Diameter | 5.500 INCHES FIRST END IN |
| Bolt Hole Nominal Diameter | 5.500 INCHES SECOND END IN |
| Bonnet Type | PACKING RETAINING |
| Nominal Outside Diameter | 6.625 INCHES SECOND END IN |
| Nominal Outside Diameter | 6.625 INCHES FIRST END IN |
| Nominal Outside Diameter | 5.562 INCHES THIRD END IN |
| Bolt Hole Quantity | 8 SECOND END |
| Bolt Hole Quantity | 8 FIRST END |
| Bolt Hole Quantity | 6 THIRD END |
| Material | STEEL OVERALL |
| Valve Operation Method | MANUAL |
| Nominal Thickness | 0.562 INCHES SECOND END IN |
| Nominal Thickness | 0.562 INCHES FIRST END IN |
| Nominal Thickness | 0.500 INCHES THIRD 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 |
|---|---|
| S-675-1 | 3/9 Design control — primary reference U.S. Government activity |
| S-675 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-118-2530 is a Valve,exhaust Control, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5985-01-302-2792. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-118-2530: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES FIRST END; Flange Shape: ROUND WITH HOLES SECOND END; Flange Shape: ROUND WITH HOLES THIRD END. 28 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.