Valve, Vent4820-01-666-8182

NSN 4820-01-666-8182 · NIIN 016668182 · Part number 2381C18X

Watts Regulator Company · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 79227

Government record, cited

NSN 4820-01-666-8182 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-666-8182. Manufacturer of record part number: 2381C18X.

Also searched as 4820-01-666-8182 · 4820016668182 · NIIN 016668182 · 01-666-8182 · FSC 4820 Valves, Nonpowered · CAGE 79227 · 2381C18X

Nearby stock numbers ← 4820-01-666-8179 Retainer, Seat, Valve · 4820-01-666-8270 Valve, Throttle →

4820-01-666-8182 — Valves, Nonpowered

Features

Valve,vent — FSC 4820
Style Designator: ANGLE
Operating Pressure: 10.0 BAR MAXIMUM SINGLE RESPONSE
Valve Size: 0.125 INCHES IN
Surface Treatment: NICKEL
Media for Which Designed: AIR SINGLE RESPONSE
Material: COPPER ALLOY BODY
1 manufacturer part number on file

Identification

NSN: 4820-01-666-8182
NIIN: 016668182
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 2381C18X
Manufacturer: Watts Regulator Company

General Description

The Valve,vent, cataloged under National Stock Number 4820-01-666-8182, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 6 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.

Technical Specifications

Parameter	Value
NSN	4820-01-666-8182
Primary Part Number	2381C18X
Item Name	Valve,vent
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Watts Regulator Company
Status	ACTIVE
Style Designator	ANGLE
Operating Pressure	10.0 BAR MAXIMUM SINGLE RESPONSE
Valve Size	0.125 INCHES IN
Surface Treatment	NICKEL
Media for Which Designed	AIR SINGLE RESPONSE
Material	COPPER ALLOY BODY

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
2381C18X PRIMARY	Watts Regulator Company (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 4820-01-666-8182?

NSN 4820-01-666-8182 is a Valve,vent, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-666-8182?

NSN 4820-01-666-8182 has 1 manufacturer part number on file: 2381C18X (Watts Regulator Company).

What are the specifications of 2381C18X?

Key specifications for 2381C18X: Style Designator: ANGLE; Operating Pressure: 10.0 BAR MAXIMUM SINGLE RESPONSE; Valve Size: 0.125 INCHES IN; Surface Treatment: NICKEL. 6 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-666-8182 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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