PartsTable TECHNICAL DATA SHEET

NSN 4820-01-421-1661Government record, cited

Valve, Regulating, Fluid Pressure4820-01-421-1661

NSN 4820-01-421-1661 · NIIN 014211661 · Part number 6458177-1

Honeywell Intl Inc Defense Avionics Systems · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 55972

Government record, cited

NSN 4820-01-421-1661 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-421-1661. Manufacturer of record part number: 6458177-1.

Also searched as 4820-01-421-1661 · 4820014211661 · NIIN 014211661 · 01-421-1661 · FSC 4820 Valves, Nonpowered · CAGE 55972 · 6458177-1

Nearby stock numbers ← 4820-01-421-1657 Valve, Bleeder, Hydraulic System · 4820-01-421-1664 Valve, Regulating, Fluid Pressure →

4820-01-421-1661 — Valves, Nonpowered

Features

Valve,regulating,fluid Pressure — FSC 4820
1 manufacturer part number on file
Manufacturer of record: Honeywell Intl Inc Defense Avionics Systems

Identification

NSN: 4820-01-421-1661
NIIN: 014211661
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 6458177-1
Manufacturer: Honeywell Intl Inc Defense Avionics Systems

General Description

The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-421-1661, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.

Technical Specifications

Parameter	Value
NSN	4820-01-421-1661
Primary Part Number	6458177-1
Item Name	Valve,regulating,fluid Pressure
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Honeywell Intl Inc Defense Avionics Systems
Status	ACTIVE

Lifecycle & Compliance

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

Cross-Reference Index

Part Number	Manufacturer
6458177-1 PRIMARY	Honeywell Intl Inc Defense Avionics Systems (USA)

Reference documents

Reference	Meaning
6458177-1	3/9 Design control — primary reference Honeywell Intl Inc Defense Avionics Systems

No interchangeability data on file.

Other items in FSC 4820 — Valves, Nonpowered

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

4820-00-000-0097

4820-00-000-0097 · Item name not on file

4820-00-001-0010

VALVE,ROTARY,SELECTOR

4820-00-001-0020

4820-00-001-0020 · Item name not on file

4820-00-001-0021

4820-00-001-0021 · Item name not on file

4820-00-001-0032

4820-00-001-0032 · Item name not on file

4820-00-001-0037

VALVE,SAFETY RELIEF

4820-00-001-0042

4820-00-001-0042 · Item name not on file

4820-00-001-1230

4820-00-001-1230 · Item name not on file

Frequently Asked Questions

What is NSN 4820-01-421-1661?

NSN 4820-01-421-1661 is a Valve,regulating,fluid Pressure, manufactured by Honeywell Intl Inc Defense Avionics Systems, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-421-1661?

NSN 4820-01-421-1661 has 1 manufacturer part number on file: 6458177-1 (Honeywell Intl Inc Defense Avionics Systems).

What are the specifications of 6458177-1?

Key specifications for 6458177-1: End Item Identification: AIRCRAFT, EAGLE F-15. 0 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-421-1661 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

What is the DEMIL code for NSN 4820-01-421-1661?

NSN 4820-01-421-1661 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.

Sources

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.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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