PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

22250Wheel Assy-Fourth

Waltham Clock Co Inc · NSN 6645-00-449-2644 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-00-449-2644 — this item is cataloged by the U.S. Government under National Stock Number 6645-00-449-2644. Primary manufacturer part number: 22250.
Features
  • Wheel Assy-Fourth — FSC 6645
  • 1 verified cross-reference
  • Primary manufacturer: Waltham Clock Co Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Wheel Assy-Fourth, cataloged under National Stock Number 6645-00-449-2644, is classified within Federal Supply Class 6645 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Waltham Clock Co Inc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameWheel Assy-Fourth
FSC / FSG6645 — No Item Name Available (FSG 66)
ManufacturersWaltham Clock Co Inc (CAGE 79300)
Technical Specifications
ParameterValue
NSN6645-00-449-2644
Primary Part Number22250
Item NameWheel Assy-Fourth
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerWaltham Clock Co Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 11
2915-00-397-553022250 INTERCHANGEABLE
Stop,solenoid Adjusting
Hydro-Aire Aerospace Corp
4310-00-459-609522250 INTERCHANGEABLE
Filter,air
Pall Aeropower Corp Sub of Pall Corp Mectron Industries Div
5305-00-765-4348MS51959-34 INTERCHANGEABLE
Screw,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
5935-00-883-74029975878 INTERCHANGEABLE
Cover,electrical Connector
Us Army Aviation and Missile Command
7530-01-025-127522250 INTERCHANGEABLE
Chart,recording Instrument
L3 Technologies, Inc. Div L3harris Edo Western Corporation
5998-01-327-774822250-104 INTERCHANGEABLE
Circuit Card Assembly
Fisica Applied Technologies, Inc. Div Datron Advanced Technologies
5110-01-358-520722250 INTERCHANGEABLE
Stripper,optical Fiber,hand
Norland Products Inc.
4320-01-441-731122250-2 INTERCHANGEABLE
Parts Kit,centrifugal Pump
Exceltec Intl Corp
6680-01-481-700022250-300 INTERCHANGEABLE
Cap,meter,flow Rate Indicating
Hydraulics International, Inc. Dba Hydraulics International Inc
1005-01-562-901422250 INTERCHANGEABLE
Rifle,7.62 Millimeter
Charles Reed Knight Jr Dba Knight's Armament Company
Cross-Reference Index
Part NumberManufacturer
22250 Waltham Clock Co Inc (USA)
Related Parts
2915-00-397-5530INTERCHANGEABLE
STOP,SOLENOID ADJUSTING
22250
4310-00-459-6095INTERCHANGEABLE
FILTER,AIR
22250
5305-00-765-4348INTERCHANGEABLE
SCREW,MACHINE
MS51959-34
5935-00-883-7402INTERCHANGEABLE
COVER,ELECTRICAL CONNECTOR
9975878
7530-01-025-1275INTERCHANGEABLE
CHART,RECORDING INSTRUMENT
22250
5998-01-327-7748INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
22250-104
5110-01-358-5207INTERCHANGEABLE
STRIPPER,OPTICAL FIBER,HAND
22250
4320-01-441-7311INTERCHANGEABLE
PARTS KIT,CENTRIFUGAL PUMP
22250-2
6680-01-481-7000INTERCHANGEABLE
CAP,METER,FLOW RATE INDICATING
22250-300
1005-01-562-9014INTERCHANGEABLE
RIFLE,7.62 MILLIMETER
22250
5110-01-645-1528INTERCHANGEABLE
DIE SET,METAL STAMPING,HAND

Frequently Asked Questions

What is NSN 6645-00-449-2644?

NSN 6645-00-449-2644 is a Wheel Assy-Fourth, manufactured by Waltham Clock Co Inc, classified under FSC 6645 (No Item Name Available). Status: active.

What are the part numbers for NSN 6645-00-449-2644?

NSN 6645-00-449-2644 has 1 cross-referenced part number: 22250 (Waltham Clock Co Inc).

What NSN replaces 6645-00-449-2644?

There are 11 known substitutes for 6645-00-449-2644: 2915-00-397-5530, 4310-00-459-6095, 5305-00-765-4348 and 8 more. Verify interchangeability with system specifications before substitution.

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