Valve, Pressure Switch4820-01-044-4954

NSN 4820-01-044-4954 · NIIN 010444954 · Part number 21SN04-139-1

Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 02750

Government record, cited

NSN 4820-01-044-4954 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-044-4954. Manufacturer of record part number: 21SN04-139-1.

Also searched as 4820-01-044-4954 · 4820010444954 · NIIN 010444954 · 01-044-4954 · FSC 4820 Valves, Nonpowered · CAGE 02750 · 21SN04-139-1

Nearby stock numbers ← 4820-01-044-4909 Valve, Expansion · 4820-01-044-5099 →

4820-01-044-4954 — Valves, Nonpowered

Features

Valve,pressure Switch — FSC 4820
1 manufacturer part number on file
Manufacturer of record: Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution

Identification

NSN: 4820-01-044-4954
NIIN: 010444954
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 21SN04-139-1
Manufacturer: Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution

General Description

The Valve,pressure Switch, cataloged under National Stock Number 4820-01-044-4954, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-044-4954
Primary Part Number	21SN04-139-1
Item Name	Valve,pressure Switch
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
21SN04-139-1 PRIMARY	Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution (USA)

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 4820-01-044-4954?

NSN 4820-01-044-4954 is a Valve,pressure Switch, manufactured by Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-044-4954?

NSN 4820-01-044-4954 has 1 manufacturer part number on file: 21SN04-139-1 (Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution).

What are the specifications of 21SN04-139-1?

Key specifications for 21SN04-139-1: End Item Identification: F-16. 0 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-044-4954 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.

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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