The Valve,butterfly, cataloged under National Stock Number 4820-00-822-8046, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | 4820-00-822-8046 |
| Primary Part Number | 550985 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Recess Nominal Depth | 0.055 INCHES FIRST END IN |
| Flange Shape | RECTANGULAR WITH HOLES FIRST END |
| Flange Face Design | RECESSED STRAIGHT FIRST END |
| Connection Type | FLANGE FIRST END |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.190 INCHES FIRST END IN |
| Bonnet Type | INSIDE SCREW |
| Bolt Hole Quantity | 4 FIRST END |
| Face to Face Distance | 1.440 INCHES IN |
| Valve Operation Method | AIR |
| Recess Nominal Diameter | 1.520 INCHES FIRST END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 550985 PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
NSN 4820-00-822-8046 is a Valve,butterfly, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-822-8046 has 1 manufacturer part number on file: 550985 (Hamilton Sundstrand Corporation Dba Collins Aerospace).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-576-9002. Verify interchangeability with system specifications before substitution.
Key specifications for 550985: Recess Nominal Depth: 0.055 INCHES FIRST END IN; Flange Shape: RECTANGULAR WITH HOLES FIRST END; Flange Face Design: RECESSED STRAIGHT FIRST END; Connection Type: FLANGE FIRST END. 11 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 4820-00-822-8046 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.