Cover, Ventilatory4140-01-646-2373

NSN 4140-01-646-2373 · NIIN 016462373

FSC 4140 — Fans, Air Circulators, and Blower Equipment · FSG 41 — Refrigeration, AC, and Air Circulating Equipment

Government record, cited

Also searched as 4140-01-646-2373 · 4140016462373 · NIIN 016462373 · 01-646-2373 · FSC 4140 Fans, Air Circulators, and Blower Equipment

Nearby stock numbers ← 4140-01-646-2332 Impeller, Fan, Axial · 4140-01-646-2495 Impeller, Fan, Axial →

Features

Cover,ventilatory — FSC 4140
Special Test Features: FIRE,WATER,AND WEATHER RESISTANT
Shape: WEDGE
Frame Removability: REMOVABLE

Identification

NSN: 4140-01-646-2373
NIIN: 016462373
FSC: 4140 — Fans, Air Circulators, and Blower Equipment
FSG: 41 — Refrigeration, AC, and Air Circulating Equipment

General Description

The Cover,ventilatory, cataloged under National Stock Number 4140-01-646-2373, is classified within Federal Supply Class 4140 (Fans, Air Circulators, and Blower Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4140-01-646-2373
Item Name	Cover,ventilatory
FSC / FSG	4140 / 41 — Fans, Air Circulators, and Blower Equipment
Status	ACTIVE
Special Test Features	FIRE,WATER,AND WEATHER RESISTANT
Shape	WEDGE
Frame Removability	REMOVABLE

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

⇄ Related Items 2

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

5340-01-723-27479-2-9052-1 POSSIBLE MATCH

COVER,ACCESS

Possible match (shared part number)W1d1 Natick Soldier Center Dba Us Army Ccdc Soldier Center Div Combat Capabilities Development Command - Soldier Center

5340-01-725-93769-2-9052-2 POSSIBLE MATCH

COVER,ACCESS

Possible match (shared part number)W1d1 Natick Soldier Center Dba Us Army Ccdc Soldier Center Div Combat Capabilities Development Command - Soldier Center

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
9-2-9052	3/2 Design control — primary reference U.S. Government activity

Related Parts

5340-01-723-2747POSSIBLE MATCH

COVER,ACCESS

9-2-9052-1

5340-01-725-9376POSSIBLE MATCH

COVER,ACCESS

9-2-9052-2

Frequently Asked Questions

What is NSN 4140-01-646-2373?

NSN 4140-01-646-2373 is a Cover,ventilatory, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.

What NSN replaces 4140-01-646-2373?

2 possible matches (shared part number, not a government interchangeability claim): 5340-01-723-2747, 5340-01-725-9376. Verify interchangeability with system specifications before substitution.

What are the specifications of 4140-01-646-2373?

Key specifications for 4140-01-646-2373: Special Test Features: FIRE,WATER,AND WEATHER RESISTANT; Shape: WEDGE; Overall Length: 15.07 INCHES NOMINAL IN; Overall Width: 11.54 INCHES NOMINAL IN. 3 specifications are documented in the U.S. Government catalog.

Is NSN 4140-01-646-2373 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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