PartsTable TECHNICAL DATA SHEET

NSN 4820-01-457-3857Government record, cited

Valve, Vent4820-01-457-3857

NSN 4820-01-457-3857 · NIIN 014573857 · Part number DT-021

Smith Eastern Corp Div Airverter · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 40811

Government record, cited

NSN 4820-01-457-3857 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-457-3857. Manufacturer of record part number: DT-021.

Also searched as 4820-01-457-3857 · 4820014573857 · NIIN 014573857 · 01-457-3857 · FSC 4820 Valves, Nonpowered · CAGE 40811 · DT-021

Nearby stock numbers ← 4820-01-457-3808 Valve, Ball · 4820-01-457-4055 Seat, Valve →

4820-01-457-3857 — Valves, Nonpowered

Features

Valve,vent — FSC 4820
1 manufacturer part number on file
Manufacturer of record: Smith Eastern Corp Div Airverter

Identification

NSN: 4820-01-457-3857
NIIN: 014573857
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: DT-021
Manufacturer: Smith Eastern Corp Div Airverter

General Description

The Valve,vent, cataloged under National Stock Number 4820-01-457-3857, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Smith Eastern Corp Div Airverter. 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	4820-01-457-3857
Primary Part Number	DT-021
Item Name	Valve,vent
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Smith Eastern Corp Div Airverter
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
DT-021 PRIMARY	Smith Eastern Corp Div Airverter (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

Related Parts in Valves

4820-00-000-0097

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

4820-00-001-0010

VALVE,ROTARY,SELECTOR

8171E-1/4HS2

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

D559A3M2

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 4820-01-457-3857?

NSN 4820-01-457-3857 is a Valve,vent, manufactured by Smith Eastern Corp Div Airverter, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-457-3857?

NSN 4820-01-457-3857 has 1 manufacturer part number on file: DT-021 (Smith Eastern Corp Div Airverter).

What are the specifications of DT-021?

Key specifications for DT-021: End Item Identification: 4940-01-457-1936. 0 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-457-3857 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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