The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-421-1664, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Honeywell Intl Inc Defense Avionics Systems. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-421-1664 |
| Primary Part Number | 6458177-2 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Honeywell Intl Inc Defense Avionics Systems |
| Status | ACTIVE |
| 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 |
|---|---|
| 6458177-2 PRIMARY | Honeywell Intl Inc Defense Avionics Systems (USA) |
| Reference | Meaning |
|---|---|
| 6458177-2 | 3/9 Design control — primary reference Honeywell Intl Inc Defense Avionics Systems |
NSN 4820-01-421-1664 is a Valve,regulating,fluid Pressure, manufactured by Honeywell Intl Inc Defense Avionics Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-1664 has 1 manufacturer part number on file: 6458177-2 (Honeywell Intl Inc Defense Avionics Systems).
Key specifications for 6458177-2: End Item Identification: AIRCRAFT, EAGLE F-15. 0 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.