PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18143Lamp,incandescent

Gte Products Corp Sylvania Miniature Lighting Div · NSN 6240-00-255-2041 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-00-255-2041 — this item is cataloged by the U.S. Government under National Stock Number 6240-00-255-2041. Primary manufacturer part number: 18143.
Features
  • Lamp,incandescent — FSC 6240
  • Wattage Rating: 20.000 WATTS
  • Bulb Designator: T-6 1/2
  • Base Style: INTERMEDIATE SCREW
  • Bulb Style: T (TUBULAR)
  • Voltage Rating: 120.000 VOLTS NOMINAL
  • Specification/standard Data: 08108-20T6 1/2IF MANUFACTURERS STANDARD
  • Average Life Rating in Hours: 5000.0
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lamp,incandescent, cataloged under National Stock Number 6240-00-255-2041, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Gte Products Corp Sylvania Miniature Lighting Div. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6240-00-255-2041
Primary Part Number18143
Item NameLamp,incandescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerGte Products Corp Sylvania Miniature Lighting Div
StatusCANCELLED
Wattage Rating20.000 WATTS
Bulb DesignatorT-6 1/2
Base StyleINTERMEDIATE SCREW
Bulb StyleT (TUBULAR)
Voltage Rating120.000 VOLTS NOMINAL
Specification/standard Data08108-20T6 1/2IF MANUFACTURERS STANDARD
Average Life Rating in Hours5000.0
Current Rating for Which Designed0.167 AMPERES NOMINAL
Bulb Light Transmission CharacteristicTRANSLUCENT
Light Output Rating90.000 LUMENS NOMINAL SINGLE RATING
Rated Average LifeHOURS
Filament Heavy Duty Service RatingNOT RATED
Emitted Light CharacteristicWHITE
Filament DesignationC-8
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
3110-00-100-357433269 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
2910-00-235-431318143 INTERCHANGEABLE
Filter,fluid
Arvinmeritor Inc
5961-00-901-48621853-0016 INTERCHANGEABLE
Transistor
Keysight Technologies Inc
5950-01-053-275512847 INTERCHANGEABLE
Reactor
Magnespec Inc
5915-01-436-753160-90532 INTERCHANGEABLE
Filter,radio Frequency Interfere
Technical Wire Products, Llc Dba Twp
3740-01-586-9670 INTERCHANGEABLE
Trap,mosquito Light
Cross-Reference Index
Part NumberManufacturer
20T6IT/IF 21ST Century Enterprises Inc (USA)
20T6 1/2 IF U S Lighting Corp (USA)
20T6 1-2IF General Electric Company Dba Ge (USA)
20T6 1-2IF Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
20T6 1/2IF-120V Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company (USA)
20T6-1/2/CF Gte Products Corp Sylvania Miniature Lighting Div (USA)
18143 PRIMARY Gte Products Corp Sylvania Miniature Lighting Div (USA)
VARIABLE PRICING Dla Aviation Engineering Div Department of Defense (USA)
Related Parts
3110-00-100-3574INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
33269
2910-00-235-4313INTERCHANGEABLE
FILTER,FLUID
18143
5961-00-901-4862INTERCHANGEABLE
TRANSISTOR
1853-0016
5950-01-053-2755INTERCHANGEABLE
REACTOR
12847
5915-01-436-7531INTERCHANGEABLE
FILTER,RADIO FREQUENCY INTERFERE
60-90532
3740-01-586-9670INTERCHANGEABLE
TRAP,MOSQUITO LIGHT

Frequently Asked Questions

What is NSN 6240-00-255-2041?

NSN 6240-00-255-2041 is a Lamp,incandescent, manufactured by Gte Products Corp Sylvania Miniature Lighting Div, classified under FSC 6240 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6240-00-255-2041?

NSN 6240-00-255-2041 has 8 cross-referenced part numbers: 20T6IT/IF (21ST Century Enterprises Inc), 20T6 1/2 IF (U S Lighting Corp), 20T6 1-2IF (General Electric Company Dba Ge), 20T6 1-2IF (Lamp Industry for Use with Industry Designations and Abbreviations for Lamps), 20T6 1/2IF-120V (Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company) and 3 more.

What NSN replaces 6240-00-255-2041?

There are 6 known substitutes for 6240-00-255-2041: 3110-00-100-3574, 2910-00-235-4313, 5961-00-901-4862 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18143?

Key specifications for 18143: Wattage Rating: 20.000 WATTS; Bulb Designator: T-6 1/2; Base Style: INTERMEDIATE SCREW; Bulb Style: T (TUBULAR). 15 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6240-00-255-2041 still in active supply?

NSN 6240-00-255-2041 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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