PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1200T20Lamp,incandescent

American National Standards Institute Incorporated Dba American National Standards Institute · NSN 6240-00-556-8012 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-00-556-8012 — this item is cataloged by the U.S. Government under National Stock Number 6240-00-556-8012. Primary manufacturer part number: 1200T20.
Features
  • Lamp,incandescent — FSC 6240
  • Base Style: MOGUL BIPOST
  • Filament Designation: CC-8
  • Wattage Rating: 1200.000 WATTS
  • Burning Position: HORIZONTAL
  • Bulb Light Transmission Characteristic: TRANSPARENT
  • Light Output Rating: 27000.000 LUMENS NOMINAL SINGLE RATING
  • Bulb Designator: T-20
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lamp,incandescent, cataloged under National Stock Number 6240-00-556-8012, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is American National Standards Institute Incorporated Dba American National Standards Institute. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6240-00-556-8012
Primary Part Number1200T20
Item NameLamp,incandescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerAmerican National Standards Institute Incorporated Dba American National Standards Institute
StatusCANCELLED
Base StyleMOGUL BIPOST
Filament DesignationCC-8
Wattage Rating1200.000 WATTS
Burning PositionHORIZONTAL
Bulb Light Transmission CharacteristicTRANSPARENT
Light Output Rating27000.000 LUMENS NOMINAL SINGLE RATING
Bulb DesignatorT-20
Light Center Length4.000 INCHES NOMINAL IN
Bulb StyleT (TUBULAR)
Filament Heavy Duty Service RatingNOT RATED
Rated Average LifeHOURS
Emitted Light CharacteristicWHITE
Average Life Rating in Hours750.0
Features ProvidedFILAMENT SHIELDING AND HEAT RESISTANT GLASS
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
6240-00-143-3142 INTERCHANGEABLE
Lamp,incandescent
6240-00-143-6558 INTERCHANGEABLE
Lamp,incandescent
6240-00-155-7836 INTERCHANGEABLE
Lamp,incandescent
6240-00-196-44706-6AT10-1P INTERCHANGEABLE
Lamp,incandescent
General Electric Company Dba Ge
6240-00-196-4472 INTERCHANGEABLE
Lamp,incandescent
6240-00-660-8849 INTERCHANGEABLE
Lamp,incandescent
6240-01-399-4105 INTERCHANGEABLE
Lamp,incandescent
Cross-Reference Index
Part NumberManufacturer
1200T20 PRIMARY American National Standards Institute Incorporated Dba American National Standards Institute (USA)
MILL6363 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS25015-2 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
1200T20-115V Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
W-L-101 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
Related Parts
6240-00-143-3142INTERCHANGEABLE
LAMP,INCANDESCENT
6240-00-143-6558INTERCHANGEABLE
LAMP,INCANDESCENT
6240-00-155-7836INTERCHANGEABLE
LAMP,INCANDESCENT
6240-00-196-4470INTERCHANGEABLE
LAMP,INCANDESCENT
6-6AT10-1P
6240-00-196-4472INTERCHANGEABLE
LAMP,INCANDESCENT
6240-00-660-8849INTERCHANGEABLE
LAMP,INCANDESCENT
6240-01-399-4105INTERCHANGEABLE
LAMP,INCANDESCENT

Frequently Asked Questions

What is NSN 6240-00-556-8012?

NSN 6240-00-556-8012 is a Lamp,incandescent, manufactured by American National Standards Institute Incorporated Dba American National Standards Institute, classified under FSC 6240 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6240-00-556-8012?

NSN 6240-00-556-8012 has 5 cross-referenced part numbers: 1200T20 (American National Standards Institute Incorporated Dba American National Standards Institute), MILL6363 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS25015-2 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 1200T20-115V (Lamp Industry for Use with Industry Designations and Abbreviations for Lamps), W-L-101 (Federal Specifications Promulgated by General Services Administration Washington DC).

What NSN replaces 6240-00-556-8012?

There are 7 known substitutes for 6240-00-556-8012: 6240-00-143-3142, 6240-00-143-6558, 6240-00-155-7836 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1200T20?

Key specifications for 1200T20: Base Style: MOGUL BIPOST; Overall Length: 9.500 INCHES MAXIMUM IN; Filament Designation: CC-8; Wattage Rating: 1200.000 WATTS. 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6240-00-556-8012 still in active supply?

NSN 6240-00-556-8012 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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