The Valve,air Modulating, cataloged under National Stock Number 4820-00-433-8560, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Rtx Corporation Div Pratt & Whitney. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Valve,air Modulating |
| FSC / FSG | 4820 — Valves, Nonpowered (FSG 48) |
| Manufacturers | Northrop Grumman Systems Corporation (CAGE 79RG9); Rtx Corporation Div Pratt & Whitney (CAGE 55820) |
| Parameter | Value |
|---|---|
| NSN | 4820-00-433-8560 |
| Primary Part Number | 26940973 |
| Item Name | Valve,air Modulating |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Rtx Corporation Div Pratt & Whitney |
| Status | ACTIVE |
| General Characteristics Item Description | 7.800 IN. LG,7.400 IN. W,3.260 IN. H IN |
| Reference Number Differentiating Characteristics | AS MODIFIED BY SOURCE CONTROL DWG A51E9039-1 FSCM 26512 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Part Number | Manufacturer |
|---|---|
| A51E9039-1 | Northrop Grumman Systems Corporation (USA) |
| 26940973 | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| A51E9039-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 26940973 | 5/9 Secondary reference U.S. Government activity |
| A51E9039-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
NSN 4820-00-433-8560 is a Valve,air Modulating, manufactured by Rtx Corporation Div Pratt & Whitney, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-433-8560 has 2 manufacturer part numbers on file: A51E9039-1 (Northrop Grumman Systems Corporation), 26940973 (Rtx Corporation Div Pratt & Whitney).
Key specifications for 26940973: General Characteristics Item Description: 7.800 IN. LG,7.400 IN. W,3.260 IN. H IN; Reference Number Differentiating Characteristics: AS MODIFIED BY SOURCE CONTROL DWG A51E9039-1 FSCM 26512. 2 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.
NSN 4820-00-433-8560 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.