PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

55CLamp,incandescent

U S Dept of Transportation Federal Aviation Administration · NSN 6240-01-250-3387 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-01-250-3387 — this item is cataloged by the U.S. Government under National Stock Number 6240-01-250-3387. Primary manufacturer part number: 55C.
Features
  • Lamp,incandescent — FSC 6240
  • Filament Designation: C-2F
  • Bulb Light Transmission Characteristic: TRANSPARENT
  • Bulb Designator: T-2
  • Rated Average Life: HOURS
  • Base Style: TELEPHONE SLIDE NUMBER ONE
  • Voltage Rating: 55.000 VOLTS NOMINAL
  • Filament Heavy Duty Service Rating: NOT RATED
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lamp,incandescent, cataloged under National Stock Number 6240-01-250-3387, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is U S Dept of Transportation Federal Aviation Administration. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6240-01-250-3387
Primary Part Number55C
Item NameLamp,incandescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerU S Dept of Transportation Federal Aviation Administration
StatusACTIVE
Filament DesignationC-2F
Bulb Light Transmission CharacteristicTRANSPARENT
Bulb DesignatorT-2
Rated Average LifeHOURS
Base StyleTELEPHONE SLIDE NUMBER ONE
Voltage Rating55.000 VOLTS NOMINAL
Filament Heavy Duty Service RatingNOT RATED
Bulb StyleT (TUBULAR)
Light Output Rating1.100 SPHERICAL CANDLEPOWER NOMINAL SECOND RATING
Average Life Rating in Hours5000.0
Wattage Rating2.475 WATTS AND 3.300 WATTS
Light Output Rating2.200 END FOOTCANDLES NOMINAL FIRST RATING
Emitted Light CharacteristicWHITE
Current Rating for Which Designed0.045 AMPERES MINIMUM AND 0.060 AMPERES MAXIMUM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5940-00-079-1575826 INTERCHANGEABLE
Terminal Board
Keystone Electronics Corp
6675-00-226-7102 INTERCHANGEABLE
Map-O-Graph
6240-00-922-5042 INTERCHANGEABLE
Lamp,incandescent
5355-01-319-2565 INTERCHANGEABLE
Knob
5120-01-730-865255C INTERCHANGEABLE
Vise,bench and Pipe
Yost Vises, Llc
Cross-Reference Index
Part NumberManufacturer
55C Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company (USA)
55C PRIMARY U S Dept of Transportation Federal Aviation Administration (USA)
Related Parts
5940-00-079-1575INTERCHANGEABLE
TERMINAL BOARD
826
6675-00-226-7102INTERCHANGEABLE
MAP-O-GRAPH
6240-00-922-5042INTERCHANGEABLE
LAMP,INCANDESCENT
5355-01-319-2565INTERCHANGEABLE
KNOB
5120-01-730-8652INTERCHANGEABLE
VISE,BENCH AND PIPE
55C

Frequently Asked Questions

What is NSN 6240-01-250-3387?

NSN 6240-01-250-3387 is a Lamp,incandescent, manufactured by U S Dept of Transportation Federal Aviation Administration, classified under FSC 6240 (No Item Name Available). Status: active.

What are the part numbers for NSN 6240-01-250-3387?

NSN 6240-01-250-3387 has 2 cross-referenced part numbers: 55C (Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company), 55C (U S Dept of Transportation Federal Aviation Administration).

What NSN replaces 6240-01-250-3387?

There are 5 known substitutes for 6240-01-250-3387: 5940-00-079-1575, 6675-00-226-7102, 6240-00-922-5042 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 55C?

Key specifications for 55C: Overall Length: 1.688 INCHES MAXIMUM IN; Filament Designation: C-2F; Bulb Light Transmission Characteristic: TRANSPARENT; Bulb Designator: T-2. 15 total characteristics are documented in the Federal Logistics Information System.

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