Guard, Fan Impeller4140-01-437-3855

NSN 4140-01-437-3855 · NIIN 014373855 · Part number 65331

Thermal Transfer Products Ltd · FSC 4140 — Fans, Air Circulators, and Blower Equipment · FSG 41 — Refrigeration, AC, and Air Circulating Equipment · CAGE 55724

Government record, cited

NSN 4140-01-437-3855 — this item is cataloged by the U.S. Government under National Stock Number 4140-01-437-3855. Manufacturer of record part number: 65331.

Also searched as 4140-01-437-3855 · 4140014373855 · NIIN 014373855 · 01-437-3855 · FSC 4140 Fans, Air Circulators, and Blower Equipment · CAGE 55724 · 65331

Nearby stock numbers ← 4140-01-437-3573 Blower, Air Barrier · 4140-01-437-3857 Fan, Vaneaxial →

Features

Guard,fan Impeller — FSC 4140
1 manufacturer part number on file
Manufacturer of record: Thermal Transfer Products Ltd

Identification

NSN: 4140-01-437-3855
NIIN: 014373855
FSC: 4140 — Fans, Air Circulators, and Blower Equipment
FSG: 41 — Refrigeration, AC, and Air Circulating Equipment
Primary part number: 65331
Manufacturer: Thermal Transfer Products Ltd

General Description

The Guard,fan Impeller, cataloged under National Stock Number 4140-01-437-3855, is classified within Federal Supply Class 4140 (Fans, Air Circulators, and Blower Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Thermal Transfer Products Ltd. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Catalog Facts

Item Name	Guard,fan Impeller
FSC / FSG	4140 — Fans, Air Circulators, and Blower Equipment (FSG 41)
Manufacturers	Thermal Transfer Products Ltd (CAGE 55724)

Technical Specifications

Parameter	Value
NSN	4140-01-437-3855
Primary Part Number	65331
Item Name	Guard,fan Impeller
FSC / FSG	4140 / 41 — Fans, Air Circulators, and Blower Equipment
Manufacturer	Thermal Transfer Products Ltd
Status	ACTIVE

Lifecycle & Compliance

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

⇄ Related Items 1

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

5975-01-492-37906533-1 POSSIBLE MATCH

CHASSIS,ELECTRICAL-ELECTRONIC EQ

Possible match (shared part number)Kontron America, Incorporated Dba Kontron Mobile Computing

Cross-Reference Index

Part Number	Manufacturer
65331 PRIMARY	Thermal Transfer Products Ltd (USA)

Related Parts

5975-01-492-3790POSSIBLE MATCH

CHASSIS,ELECTRICAL-ELECTRONIC EQ

6533-1

Frequently Asked Questions

What is NSN 4140-01-437-3855?

NSN 4140-01-437-3855 is a Guard,fan Impeller, manufactured by Thermal Transfer Products Ltd, classified under FSC 4140, Fans, Air Circulators, and Blower Equipment. Status: active.

What part numbers are listed for NSN 4140-01-437-3855?

NSN 4140-01-437-3855 has 1 manufacturer part number on file: 65331 (Thermal Transfer Products Ltd).

What NSN replaces 4140-01-437-3855?

1 possible match (shared part number, not a government interchangeability claim): 5975-01-492-3790. Verify interchangeability with system specifications before substitution.

Is NSN 4140-01-437-3855 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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