PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21657Fan,circulating

Itw Gse Inc. · NSN 4140-01-545-6800 · FSC 4140 · No Item Name Available
Verified by PartsTable
NSN 4140-01-545-6800 — this item is cataloged by the U.S. Government under National Stock Number 4140-01-545-6800. Primary manufacturer part number: 21657.
Features
  • Fan,circulating — FSC 4140
  • Style Designator: FIXED
  • Drive Type: DIRECT
  • 2 verified cross-references
  • Primary manufacturer: Itw Gse Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Fan,circulating, cataloged under National Stock Number 4140-01-545-6800, is classified within Federal Supply Class 4140 (No Item Name Available) of the Refrigeration, AC, and Air Circulating Equipment group. The primary manufacturer of record is Itw Gse Inc.. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4140-01-545-6800
Primary Part Number21657
Item NameFan,circulating
FSC / FSG4140 / 41 — No Item Name Available
ManufacturerItw Gse Inc.
StatusACTIVE
Style DesignatorFIXED
Drive TypeDIRECT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5905-00-115-7216 INTERCHANGEABLE
Resistor,variable,wire Wound,non
2530-00-350-64925590650 INTERCHANGEABLE
Filter,fluid
U S Army Tank Automotive Command Amsta-Im-Mm
6685-00-488-5591 INTERCHANGEABLE
Thermometer,self-Indicating,bime
5330-00-997-1909 INTERCHANGEABLE
Packing,preformed
4730-01-036-9487 INTERCHANGEABLE
Adapter,straight,pipe to Boss
5310-01-327-906421657 INTERCHANGEABLE
Washer,spring Tension
Parker Hannifin Corporation Div Hydraulic Systems Division
5895-01-384-562321657 INTERCHANGEABLE
Modem,communications
Motorola/codex Corp Sub of Motorola Inc
5310-01-413-899621657 INTERCHANGEABLE
Washer,spring Tension
Industrial Technologies and Services Llc
4720-01-434-7947 INTERCHANGEABLE
Hose Assembly,nonmetallic
5963-01-652-9908 INTERCHANGEABLE
Electronic Module,standardized
Cross-Reference Index
Part NumberManufacturer
21657 Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems (USA)
21657 PRIMARY Itw Gse Inc. (USA)
Related Parts
5905-00-115-7216INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
2530-00-350-6492INTERCHANGEABLE
FILTER,FLUID
5590650
6685-00-488-5591INTERCHANGEABLE
THERMOMETER,SELF-INDICATING,BIME
5330-00-997-1909INTERCHANGEABLE
PACKING,PREFORMED
4730-01-036-9487INTERCHANGEABLE
ADAPTER,STRAIGHT,PIPE TO BOSS
5310-01-327-9064INTERCHANGEABLE
WASHER,SPRING TENSION
21657
5895-01-384-5623INTERCHANGEABLE
MODEM,COMMUNICATIONS
21657
5310-01-413-8996INTERCHANGEABLE
WASHER,SPRING TENSION
21657
4720-01-434-7947INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
5963-01-652-9908INTERCHANGEABLE
ELECTRONIC MODULE,STANDARDIZED

Frequently Asked Questions

What is NSN 4140-01-545-6800?

NSN 4140-01-545-6800 is a Fan,circulating, manufactured by Itw Gse Inc., classified under FSC 4140 (No Item Name Available). Status: active.

What are the part numbers for NSN 4140-01-545-6800?

NSN 4140-01-545-6800 has 2 cross-referenced part numbers: 21657 (Gse Holdings Inc. Dba Itw Military Gse Div Hobart Ground Systems), 21657 (Itw Gse Inc.).

What NSN replaces 4140-01-545-6800?

There are 10 known substitutes for 4140-01-545-6800: 5905-00-115-7216, 2530-00-350-6492, 6685-00-488-5591 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21657?

Key specifications for 21657: Part Name Assigned by Controlling Agency: ASSY, COOLING FAN; Style Designator: FIXED; End Item Identification: POWER SUPPLY; Drive Type: DIRECT. 4 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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