PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AEX255Meter,time Totalizing

Tropic-Aire Carrier Division of Mc Graw-Edison Co · NSN 6645-00-618-9496 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-00-618-9496 — this item is cataloged by the U.S. Government under National Stock Number 6645-00-618-9496. Primary manufacturer part number: AEX255.
Features
  • Meter,time Totalizing — FSC 6645
  • Maximum Measurement: 99999.90
  • Mounting Flange Width: 2.969 INCHES NOMINAL IN
  • Mounting Method: SEMIFLUSH
  • Hermetic Protection: NOT PROVIDED
  • Measurement Unit: HOURS
  • Body Depth: 2.750 INCHES NOMINAL IN
  • Material: PLASTIC CASE
Applications
  • Applications requiring Plastic Case construction
General Description

The Meter,time Totalizing, cataloged under National Stock Number 6645-00-618-9496, is classified within Federal Supply Class 6645 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Tropic-Aire Carrier Division of Mc Graw-Edison Co. Government technical data includes 23 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 46 commercial cross-references from 30 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6645-00-618-9496
Primary Part NumberAEX255
Item NameMeter,time Totalizing
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerTropic-Aire Carrier Division of Mc Graw-Edison Co
StatusCANCELLED
Maximum Measurement99999.90
Mounting Flange Width2.969 INCHES NOMINAL IN
Mounting MethodSEMIFLUSH
Hermetic ProtectionNOT PROVIDED
Measurement UnitHOURS
Body Depth2.750 INCHES NOMINAL IN
MaterialPLASTIC CASE
Mounting ConfigurationFOUR NO. 4-40 THREAD MTG HOLES EQUALLY SPACED 2.250 IN. APART IN
Operating Frequency60.0 HERTZ NOMINAL
Marking ColorWHITE NUMERALS FOR HUNDRETHS,BLACK NUMERALS FOR TENTHS
Electrical Movement TypeMOTOR
Unit TypeMOUNTED
Smallest Increment Indicated0.10
Movement TypeELECTRICAL
Indicator TypeDRUM REGISTER
Voltage Rating115.0 VOLTS MINIMUM AND 125.0 VOLTS MAXIMUM
Reset FeatureNOT PROVIDED
Background ColorBLACK BACKGROUND ON HR WHEELS,WHITE BACKGROUND ON TENTHS WHEEL
Mounting TypePANEL
Body Diameter2.203 INCHES NOMINAL IN
Current TypeAC
Terminal Quantity2
Terminal TypeWIRE LEAD
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 9
5930-00-137-4536635S INTERCHANGEABLE
Switch,foot
Linemaster Switch Corporation Dba Linemaster Switch Corp
5342-00-216-9527D109 INTERCHANGEABLE
Bracket,shaft,front
Insinger Machine Co
6645-00-285-878140178REVA INTERCHANGEABLE
Meter,time Totalizing
Bae Systems Information and Electronic Systems Integration Inc. Dba Bae Systems
3810-00-352-5718 INTERCHANGEABLE
Cartridge
6645-00-531-3722 INTERCHANGEABLE
Meter,time Totalizing
5930-00-548-6881632S INTERCHANGEABLE
Switch,foot
Linemaster Switch Corporation Dba Linemaster Switch Corp
2920-00-640-7704 INTERCHANGEABLE
Contact Set,distributor
3455-01-046-1475 INTERCHANGEABLE
Cutter,milling,end
5895-01-607-233212010V3000 INTERCHANGEABLE
Switching Set,communications
Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service
Cross-Reference Index
Part NumberManufacturer
AEX255 Tropic-Aire Carrier Division of Mc Graw-Edison Co (USA)
K42203P4 Vdo Control Systems Inc (USA)
D109 L3harris Technologies, Inc Div Space & Airborne Systems (USA)
57ET Simpson Electric Company, Inc. (USA)
NA5-11086-1 The Boeing Company (USA)
291B474A09 Westinghouse Electric Corp (USA)
455480 Eastman Kodak Co Commercial & Government Systems (USA)
NAS11086-1 The Boeing Company (USA)
634SA08S Cramer Co Division of Chestnut Group Inc (USA)
635S120VAC60CY9999HR Cramer Co Division of Chestnut Group Inc (USA)
632SA08S Cramer Co Division of Chestnut Group Inc (USA)
EN3012A1600120V General Time Controls Inc (USA)
B211003-0000 Butler National Corp (USA)
50-235132HAAA1JA Ametek Inc Div Aerospace and Defense (USA)
9408M81P25 General Electric Co General Purpose Control Dept (USA)
455480 Danka Office Imaging Company (USA)
112-0300001 General Dynamics Information Technology, Inc. Div Defense Group (USA)
106073-1 L3harris Technologies, Inc. Dba Harris Corp Div Antenna Products (USA)
372A600F01 Electric Machinery Dresser Industries Inc (USA)
L61406-1 Acoustical Labs Inc (USA)
Related Parts
5930-00-137-4536INTERCHANGEABLE
SWITCH,FOOT
635S
5342-00-216-9527INTERCHANGEABLE
BRACKET,SHAFT,FRONT
D109
6645-00-285-8781INTERCHANGEABLE
METER,TIME TOTALIZING
40178REVA
3810-00-352-5718INTERCHANGEABLE
CARTRIDGE
6645-00-531-3722INTERCHANGEABLE
METER,TIME TOTALIZING
5930-00-548-6881INTERCHANGEABLE
SWITCH,FOOT
632S
2920-00-640-7704INTERCHANGEABLE
CONTACT SET,DISTRIBUTOR
3455-01-046-1475INTERCHANGEABLE
CUTTER,MILLING,END
5895-01-607-2332INTERCHANGEABLE
SWITCHING SET,COMMUNICATIONS
12010V3000

Frequently Asked Questions

What is NSN 6645-00-618-9496?

NSN 6645-00-618-9496 is a Meter,time Totalizing, manufactured by Tropic-Aire Carrier Division of Mc Graw-Edison Co, classified under FSC 6645 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6645-00-618-9496?

NSN 6645-00-618-9496 has 46 cross-referenced part numbers: AEX255 (Tropic-Aire Carrier Division of Mc Graw-Edison Co), K42203P4 (Vdo Control Systems Inc), D109 (L3harris Technologies, Inc Div Space & Airborne Systems), 57ET (Simpson Electric Company, Inc.), NA5-11086-1 (The Boeing Company) and 41 more.

What NSN replaces 6645-00-618-9496?

There are 9 known substitutes for 6645-00-618-9496: 5930-00-137-4536, 5342-00-216-9527, 6645-00-285-8781 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AEX255?

Key specifications for AEX255: Maximum Measurement: 99999.90; Mounting Flange Width: 2.969 INCHES NOMINAL IN; Mounting Method: SEMIFLUSH; Hermetic Protection: NOT PROVIDED. 23 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6645-00-618-9496 still in active supply?

NSN 6645-00-618-9496 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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