PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20T6-1/2/DC/CFLamp,incandescent

Osram Sylvania Inc · NSN 6240-01-003-8666 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-01-003-8666 — this item is cataloged by the U.S. Government under National Stock Number 6240-01-003-8666. Primary manufacturer part number: 20T6-1/2/DC/CF.
Features
  • Lamp,incandescent — FSC 6240
  • Current Rating for Which Designed: 0.167 AMPERES NOMINAL
  • Wattage Rating: 20.000 WATTS
  • Bulb Designator: T-6 1/2
  • Bulb Light Transmission Characteristic: TRANSLUCENT
  • Rated Average Life: HOURS
  • Emitted Light Characteristic: WHITE
  • Bulb Style: T (TUBULAR)
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lamp,incandescent, cataloged under National Stock Number 6240-01-003-8666, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Osram Sylvania Inc. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 8 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
NSN6240-01-003-8666
Primary Part Number20T6-1/2/DC/CF
Item NameLamp,incandescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerOsram Sylvania Inc
StatusCANCELLED
Current Rating for Which Designed0.167 AMPERES NOMINAL
Wattage Rating20.000 WATTS
Bulb DesignatorT-6 1/2
Bulb Light Transmission CharacteristicTRANSLUCENT
Rated Average LifeHOURS
Emitted Light CharacteristicWHITE
Bulb StyleT (TUBULAR)
Average Life Rating in Hours5000.0
Filament Heavy Duty Service RatingNOT RATED
Specification/standard Data08108-20T6 1/2DC/IF MANUFACTURERS STANDARD
Voltage Rating120.000 VOLTS NOMINAL
Filament DesignationC-8
Light Output Rating90.000 LUMENS NOMINAL SINGLE RATING
Base StyleDOUBLE CONTACT BAYONET CANDELABRA
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
3110-00-100-02851B3921 INTERCHANGEABLE
Cone and Rollers,tapered Roller
Caterpillar Inc Div Caterpillar Defense
2530-00-453-59771-8144 INTERCHANGEABLE
Brake,munitions Tra
Pdi Ground Support Systems, Inc.
5961-00-574-393618-144 INTERCHANGEABLE
Transistor
Raytheon Company Dba Raytheon Co
5315-00-922-585818144 INTERCHANGEABLE
Pin,straight,headed
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
4520-01-043-2482 INTERCHANGEABLE
Support,heater
3040-01-658-022218144 INTERCHANGEABLE
Housing Part,mechanical Drive
Cadillac Gage Textron Inc.
Cross-Reference Index
Part NumberManufacturer
20T6 1/2DC/IF U S Lighting Corp (USA)
20T6 1/2DC/IF General Electric Company Dba Ge (USA)
20T6 1/2DC/IF Lamp Industry for Use with Industry Designations and Abbreviations for Lamps
20T6 1/2DC/IF Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company (USA)
20T6.5DC/FROST/EXIT 125-130V American National Standards Institute Incorporated Dba American National Standards Institute (USA)
18144 Dover Corp Elevator Div (USA)
20T6-1/2/DC/CF PRIMARY Osram Sylvania Inc (USA)
20T6DC/IF 21ST Century Enterprises Inc (USA)
Related Parts
3110-00-100-0285INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
1B3921
2530-00-453-5977INTERCHANGEABLE
BRAKE,MUNITIONS TRA
1-8144
5961-00-574-3936INTERCHANGEABLE
TRANSISTOR
18-144
5315-00-922-5858INTERCHANGEABLE
PIN,STRAIGHT,HEADED
18144
4520-01-043-2482INTERCHANGEABLE
SUPPORT,HEATER
3040-01-658-0222INTERCHANGEABLE
HOUSING PART,MECHANICAL DRIVE
18144

Frequently Asked Questions

What is NSN 6240-01-003-8666?

NSN 6240-01-003-8666 is a Lamp,incandescent, manufactured by Osram Sylvania Inc, classified under FSC 6240 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6240-01-003-8666?

NSN 6240-01-003-8666 has 8 cross-referenced part numbers: 20T6 1/2DC/IF (U S Lighting Corp), 20T6 1/2DC/IF (General Electric Company Dba Ge), 20T6 1/2DC/IF (Lamp Industry for Use with Industry Designations and Abbreviations for Lamps), 20T6 1/2DC/IF (Philips Electronics North America Corporation Dba Philips Lighting Div Philips Lighting Company), 20T6.5DC/FROST/EXIT 125-130V (American National Standards Institute Incorporated Dba American National Standards Institute) and 3 more.

What NSN replaces 6240-01-003-8666?

There are 6 known substitutes for 6240-01-003-8666: 3110-00-100-0285, 2530-00-453-5977, 5961-00-574-3936 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20T6-1/2/DC/CF?

Key specifications for 20T6-1/2/DC/CF: Current Rating for Which Designed: 0.167 AMPERES NOMINAL; Wattage Rating: 20.000 WATTS; Bulb Designator: T-6 1/2; Bulb Light Transmission Characteristic: TRANSLUCENT. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6240-01-003-8666 still in active supply?

NSN 6240-01-003-8666 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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