PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

52Lamp,incandescent

Duro-Test Lighting · NSN 6240-00-946-2171 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-00-946-2171 — this item is cataloged by the U.S. Government under National Stock Number 6240-00-946-2171. Primary manufacturer part number: 52.
Features
  • Lamp,incandescent — FSC 6240
  • Current Rating for Which Designed: 4.167 AMPERES NOMINAL
  • Filament Heavy Duty Service Rating: ROUGH SERVICE
  • Voltage Rating: 120.000 VOLTS NOMINAL
  • Emitted Light Characteristic: COLORLESS
  • Wattage Rating: 500.000 WATTS
  • Average Life Rating in Hours: 2600.0
  • Bulb Designator: T-3
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lamp,incandescent, cataloged under National Stock Number 6240-00-946-2171, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Duro-Test Lighting. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 22 commercial cross-references from 19 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6240-00-946-2171
Primary Part Number52
Item NameLamp,incandescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerDuro-Test Lighting
StatusCANCELLED
Current Rating for Which Designed4.167 AMPERES NOMINAL
Filament Heavy Duty Service RatingROUGH SERVICE
Voltage Rating120.000 VOLTS NOMINAL
Emitted Light CharacteristicCOLORLESS
Wattage Rating500.000 WATTS
Average Life Rating in Hours2600.0
Bulb DesignatorT-3
Light Center Length2.250 INCHES NOMINAL IN
Features ProvidedHEAT RESISTANT GLASS
Filament DesignationC-8
Burning PositionHORIZONTAL
Rated Average LifeHOURS
Light Output Rating10000.000 LUMENS NOMINAL SINGLE RATING
Bulb Light Transmission CharacteristicTRANSPARENT
Bulb StyleT (TUBULAR)
Base StyleRECESSED SINGLE CONTACT
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 4
5310-00-527-48262847261 INTERCHANGEABLE
Nut,plain,knurled
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5120-00-541-20281107/250 INTERCHANGEABLE
Strainer,paint
Trimaco Llc
5950-01-485-9330X-95.17.200 INTERCHANGEABLE
Transformer,tabletop
Heine Usa Ltd
4430-01-696-0801010201 INTERCHANGEABLE
Oven,thermal Drying,electric
Henkel Inc. Dba Keen Ovens
Cross-Reference Index
Part NumberManufacturer
500T3Q/CL-130V Marvel Lamp Co Inc (USA)
FCLQ500T3/CL General Electric Company Dba Ge (USA)
284-7261 Rs Components Limited (GBR)
52 PRIMARY Duro-Test Lighting (USA)
40163-91238 Us Army Aviation and Missile Command (USA)
500T3Q/CL-120V Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company (USA)
Q500T3/CL General Electric Co Lighting Systems Dept (USA)
Q500T3/CL 120V Keene Corp Stonco Lighting Div (USA)
500T3QCL Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company (USA)
L981 Verd-a-Ray Corp Sub of North American Philips Lighting Corp (USA)
500T3QCL Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
500T3Q/CL PRIMARY Gte Products Corp Sylvania Customer Support Center (USA)
FCL American National Standards Institute Incorporated Dba American National Standards Institute (USA)
587000 Rs Group - Rs Components Limited (NZL)
587000 Pneumatic Controls & Systems Ltd Pneuco (NZL)
Q500T3/CL Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
52 Duro-Test Corp (USA)
010201 Zf Industrieantriebe Witten Gmbh (DEU)
A-A-1967 Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA)
Q500T3CL120V PRIMARY General Electric Company Dba Ge (USA)
Related Parts
5310-00-527-4826INTERCHANGEABLE
NUT,PLAIN,KNURLED
2847261
5120-00-541-2028INTERCHANGEABLE
STRAINER,PAINT
1107/250
5950-01-485-9330INTERCHANGEABLE
TRANSFORMER,TABLETOP
X-95.17.200
4430-01-696-0801INTERCHANGEABLE
OVEN,THERMAL DRYING,ELECTRIC
010201

Frequently Asked Questions

What is NSN 6240-00-946-2171?

NSN 6240-00-946-2171 is a Lamp,incandescent, manufactured by Duro-Test Lighting, classified under FSC 6240 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6240-00-946-2171?

NSN 6240-00-946-2171 has 22 cross-referenced part numbers: 500T3Q/CL-130V (Marvel Lamp Co Inc), FCLQ500T3/CL (General Electric Company Dba Ge), 284-7261 (Rs Components Limited), 52 (Duro-Test Lighting), 40163-91238 (Us Army Aviation and Missile Command) and 17 more.

What NSN replaces 6240-00-946-2171?

There are 4 known substitutes for 6240-00-946-2171: 5310-00-527-4826, 5120-00-541-2028, 5950-01-485-9330 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 52?

Key specifications for 52: Current Rating for Which Designed: 4.167 AMPERES NOMINAL; Filament Heavy Duty Service Rating: ROUGH SERVICE; Voltage Rating: 120.000 VOLTS NOMINAL; Emitted Light Characteristic: COLORLESS. 18 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6240-00-946-2171 still in active supply?

NSN 6240-00-946-2171 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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