PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1850Lamp,incandescent

Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron · NSN 6240-00-044-5025 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-00-044-5025 — this item is cataloged by the U.S. Government under National Stock Number 6240-00-044-5025. Primary manufacturer part number: 1850.
Features
  • Lamp,incandescent — FSC 6240
  • Voltage Rating: 5.000 VOLTS NOMINAL
  • Light Output Rating: 0.250 SPHERICAL CANDLEPOWER NOMINAL SINGLE RATING
  • Average Life Rating in Hours: 1500.0
  • Rated Average Life: HOURS
  • Bulb Style: T (TUBULAR)
  • Bulb Designator: T-3 1/4
  • Emitted Light Characteristic: COLORLESS
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lamp,incandescent, cataloged under National Stock Number 6240-00-044-5025, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron. Government technical data includes 15 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 26 commercial cross-references from 25 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6240-00-044-5025
Primary Part Number1850
Item NameLamp,incandescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerChicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron
StatusCANCELLED
Voltage Rating5.000 VOLTS NOMINAL
Light Output Rating0.250 SPHERICAL CANDLEPOWER NOMINAL SINGLE RATING
Average Life Rating in Hours1500.0
Rated Average LifeHOURS
Bulb StyleT (TUBULAR)
Bulb DesignatorT-3 1/4
Emitted Light CharacteristicCOLORLESS
Specification/standard Data08108-1850 MANUFACTURERS STANDARD
Base StyleMINIATURE BAYONET
Current Rating for Which Designed0.090 AMPERES NOMINAL
Wattage Rating0.450 WATTS
Bulb Light Transmission CharacteristicTRANSPARENT
Filament DesignationC-2R
Filament Heavy Duty Service RatingNOT RATED
Light Center Length0.625 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
2805-00-293-9701646421 INTERCHANGEABLE
Valve,poppet,engine
Am General Llc
6210-00-472-6067 INTERCHANGEABLE
Globe,electric Light
3510-01-010-0032JV-73 INTERCHANGEABLE
Lint Screen Assembly
Alliance Laundry Systems Llc
3110-01-175-0415910042 INTERCHANGEABLE
Bearing,ball,annular
W.w. Grainger, Inc. Div Government Sales Division
3120-01-201-8985 INTERCHANGEABLE
Bearing,sleeve
3110-01-268-2601 INTERCHANGEABLE
Bearing,ball,annular
5360-01-340-6064390302 INTERCHANGEABLE
Spring,helical,compression
Fincantieri Marine Systems North America, Inc. Dba Fincantieri Marine Systems North Am
5330-01-428-701091004-2 INTERCHANGEABLE
Gasket and Seal Set
Magnetic Seal Llc
Cross-Reference Index
Part NumberManufacturer
1850 Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
1850 Daycoa Inc (USA)
PL1850 Precision Lamp Inc (USA)
1850 Advanced Technical Ceramics Company Dba Advanced Technical Ceramics Co Div Adtech Ceramics (USA)
1850 Guest Co Inc the (USA)
1850 General Electric Co Miniature Lamp Products Dept Lighting Business Group (USA)
1850 Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company (USA)
V73 Sigma Instruments Inc (USA)
1850 Gte Products Corp Lighting Products Group (USA)
1401363-9 Rca Corp Consumer Electronics (USA)
1850 PRIMARY Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron (USA)
H749-7419 PART 625 Electric Boat Corporation Div General Dynamics Electric Boat (USA)
910-042 Jaidinger Manufacturing Co Inc Dba Jaidinger Manufacturing Co Inc (USA)
1850 PRIMARY Westinghouse Electric Corp (USA)
65C82010C-08 Motorola Communications Group Parts Dept Div of Motorola Inc (USA)
87-0721 Finnigan Corporation (USA)
1850 Communication Systems Div North American Philips Corp (USA)
CM1850 Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron (USA)
256-7285223 PART 625 Naval Sea Systems Command (USA)
1850 Satair A/s (DNK)
Related Parts
2805-00-293-9701INTERCHANGEABLE
VALVE,POPPET,ENGINE
646421
6210-00-472-6067INTERCHANGEABLE
GLOBE,ELECTRIC LIGHT
3510-01-010-0032INTERCHANGEABLE
LINT SCREEN ASSEMBLY
JV-73
3110-01-175-0415INTERCHANGEABLE
BEARING,BALL,ANNULAR
910042
3120-01-201-8985INTERCHANGEABLE
BEARING,SLEEVE
3110-01-268-2601INTERCHANGEABLE
BEARING,BALL,ANNULAR
5360-01-340-6064INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
390302
5330-01-428-7010INTERCHANGEABLE
GASKET AND SEAL SET
91004-2

Frequently Asked Questions

What is NSN 6240-00-044-5025?

NSN 6240-00-044-5025 is a Lamp,incandescent, manufactured by Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron, classified under FSC 6240 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6240-00-044-5025?

NSN 6240-00-044-5025 has 26 cross-referenced part numbers: 1850 (Lamp Industry for Use with Industry Designations and Abbreviations for Lamps), 1850 (Daycoa Inc), PL1850 (Precision Lamp Inc), 1850 (Advanced Technical Ceramics Company Dba Advanced Technical Ceramics Co Div Adtech Ceramics), 1850 (Guest Co Inc the) and 21 more.

What NSN replaces 6240-00-044-5025?

There are 8 known substitutes for 6240-00-044-5025: 2805-00-293-9701, 6210-00-472-6067, 3510-01-010-0032 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1850?

Key specifications for 1850: Voltage Rating: 5.000 VOLTS NOMINAL; Light Output Rating: 0.250 SPHERICAL CANDLEPOWER NOMINAL SINGLE RATING; Average Life Rating in Hours: 1500.0; Rated Average Life: HOURS. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6240-00-044-5025 still in active supply?

NSN 6240-00-044-5025 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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