PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ML-1818XLamp,incandescent

Micro Lamps Inc. · NSN 6240-00-155-7851 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-00-155-7851 — this item is cataloged by the U.S. Government under National Stock Number 6240-00-155-7851. Primary manufacturer part number: ML-1818X.
Features
  • Lamp,incandescent — FSC 6240
  • Current Rating for Which Designed: 0.170 AMPERES NOMINAL
  • Bulb Light Transmission Characteristic: TRANSPARENT
  • Light Output Rating: 3.300 SPHERICAL CANDLEPOWER NOMINAL SINGLE RATING
  • Base Style: MINIATURE BAYONET
  • Rated Average Life: HOURS
  • Voltage Rating: 24.000 VOLTS NOMINAL
  • 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 6240-00-155-7851, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Micro Lamps Inc.. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 18 commercial cross-references from 18 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6240-00-155-7851
Primary Part NumberML-1818X
Item NameLamp,incandescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerMicro Lamps Inc.
StatusCANCELLED
Current Rating for Which Designed0.170 AMPERES NOMINAL
Bulb Light Transmission CharacteristicTRANSPARENT
Light Output Rating3.300 SPHERICAL CANDLEPOWER NOMINAL SINGLE RATING
Base StyleMINIATURE BAYONET
Rated Average LifeHOURS
Voltage Rating24.000 VOLTS NOMINAL
Emitted Light CharacteristicCOLORLESS
Wattage Rating4.080 WATTS
Filament Heavy Duty Service RatingNOT RATED
Average Life Rating in Hours250.0
Bulb StyleT (TUBULAR)
Bulb DesignatorT-3 1/4
Filament DesignationC-2V V
Light Center Length0.630 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
5998-00-483-7469 INTERCHANGEABLE
Circuit Card Assembly
2520-00-752-091818-187-1 INTERCHANGEABLE
Counter Shaft
Dana Commercial Vehicle Manufacturing, Llc Dba Dana Commercial Vehicle Products
3110-01-216-557918187-1 INTERCHANGEABLE
Bearing,roller,cylindrical
Kingsbury, Inc. Dba Messinger Bearings Div Messinger Bearings
Cross-Reference Index
Part NumberManufacturer
ML-1818X PRIMARY Micro Lamps Inc. (USA)
1818 Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company (USA)
1818 Inter-Market Inc (USA)
AN3121-1818 Aeronautical Standards Group Dept of Navy and Air Force (USA)
1818 General Electric Co Miniature Lamp Products Dept Lighting Business Group (USA)
1818 Chicago Miniature Lighting Llc Dba Chicago Miniature Optoelectron (USA)
12296038 PRIMARY U S Army Tank Automotive Command Amsta-Im-Mm (USA)
1818 Satair A/s (DNK)
5501W21 Schneider Electric Usa, Inc. (USA)
87-0704 Bae Systems Information & Electronic Systems Integration Inc. (USA)
1818 Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
1818-71 Grimes Aerospace Company (USA)
PL1818 Precision Lamp Inc (USA)
3193340R1 Furukawa Equipement (FRA)
12296038 Us Army Aviation and Missile Command (USA)
849546-5 Rca Corp Consumer Electronics (USA)
87-0704 Finnigan Corporation (USA)
LTX1818 Lamptronix Co Ltd (USA)
Related Parts
5998-00-483-7469INTERCHANGEABLE
CIRCUIT CARD ASSEMBLY
2520-00-752-0918INTERCHANGEABLE
COUNTER SHAFT
18-187-1
3110-01-216-5579INTERCHANGEABLE
BEARING,ROLLER,CYLINDRICAL
18187-1

Frequently Asked Questions

What is NSN 6240-00-155-7851?

NSN 6240-00-155-7851 is a Lamp,incandescent, manufactured by Micro Lamps Inc., classified under FSC 6240 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6240-00-155-7851?

NSN 6240-00-155-7851 has 18 cross-referenced part numbers: ML-1818X (Micro Lamps Inc.), 1818 (Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company), 1818 (Inter-Market Inc), AN3121-1818 (Aeronautical Standards Group Dept of Navy and Air Force), 1818 (General Electric Co Miniature Lamp Products Dept Lighting Business Group) and 13 more.

What NSN replaces 6240-00-155-7851?

There are 3 known substitutes for 6240-00-155-7851: 5998-00-483-7469, 2520-00-752-0918, 3110-01-216-5579. Verify interchangeability with system specifications before substitution.

What are the specifications of ML-1818X?

Key specifications for ML-1818X: Current Rating for Which Designed: 0.170 AMPERES NOMINAL; Bulb Light Transmission Characteristic: TRANSPARENT; Light Output Rating: 3.300 SPHERICAL CANDLEPOWER NOMINAL SINGLE RATING; Base Style: MINIATURE BAYONET. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6240-00-155-7851 still in active supply?

NSN 6240-00-155-7851 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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