The Valve,butterfly, cataloged under National Stock Number 4820-01-159-1268, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road). Government technical data includes 23 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-159-1268 |
| Primary Part Number | 979554-1-1 |
| Item Name | Valve,butterfly |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| Status | ACTIVE |
| Recess Nominal Depth | 0.135 INCHES FIRST END IN |
| Flange Shape | ROUND FIRST END |
| Flange Face Design | RECESSED STRAIGHT FIRST END |
| Connection Style | GASKET SEAL(BOSS) FOURTH END |
| Connection Style | GASKET SEAL(BOSS) THIRD END |
| Connection Type | THREADED INTERNAL BOSS THIRD END |
| Connection Type | THREADED INTERNAL BOSS FOURTH END |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 7.5 POUNDS PER SQUARE INCH (PSI) MINIMUM AND 17.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM POWER DRIVE LBS |
| Thread Direction | RIGHT-HAND THIRD END |
| Thread Direction | RIGHT-HAND FOURTH END |
| Nominal Thread Size | 0.438 INCHES FOURTH END IN |
| Nominal Thread Size | 0.562 INCHES THIRD END IN |
| Maximum Operating Temp | 450.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nominal Outside Diameter | 5.750 INCHES FIRST END IN |
| Thread Class | 3B THIRD END |
| Thread Class | 3B FOURTH END |
| Material | STEEL CORROSION RESISTING BODY |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) THIRD END |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) FOURTH END |
| Valve Operation Method | AIR |
| Nominal Thickness | 0.105 INCHES FIRST END IN |
| Recess Nominal Diameter | 5.163 INCHES FIRST 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 |
| Part Number | Manufacturer |
|---|---|
| 979554-1-1 PRIMARY | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
NSN 4820-01-159-1268 is a Valve,butterfly, manufactured by Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road), classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-159-1268 has 1 manufacturer part number on file: 979554-1-1 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)).
Key specifications for 979554-1-1: Recess Nominal Depth: 0.135 INCHES FIRST END IN; Flange Shape: ROUND FIRST END; Flange Face Design: RECESSED STRAIGHT FIRST END; Connection Style: GASKET SEAL(BOSS) FOURTH END. 23 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.