PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20666Lamp,fluorescent

Osram Sylvania Inc. · NSN 6240-01-419-5258 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-01-419-5258 — this item is cataloged by the U.S. Government under National Stock Number 6240-01-419-5258. Primary manufacturer part number: 20666.
Features
  • Lamp,fluorescent — FSC 6240
  • Emitted Light Characteristic: WHITE
  • Bulb Designator: T-4
  • Average Life Rating in Hours: 10000.0
  • Bulb Style: T ("U" SHAPED TUBULAR)
  • Base Style: FOUR PIN INDEXING
  • Wattage Rating: 10.000 WATTS
  • Voltage Rating: 64.000 VOLTS NOMINAL
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lamp,fluorescent, cataloged under National Stock Number 6240-01-419-5258, 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 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6240-01-419-5258
Primary Part Number20666
Item NameLamp,fluorescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerOsram Sylvania Inc.
StatusACTIVE
Emitted Light CharacteristicWHITE
Bulb DesignatorT-4
Average Life Rating in Hours10000.0
Bulb StyleT ("U" SHAPED TUBULAR)
Base StyleFOUR PIN INDEXING
Wattage Rating10.000 WATTS
Voltage Rating64.000 VOLTS NOMINAL
Rated Average LifeHOURS
Bulb Diameter1.100 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-100-316516150 INTERCHANGEABLE
Cone and Rollers,tapered Roller
The Timken Corporation
5133-00-189-9291 INTERCHANGEABLE
Drill,twist
1650-00-442-8083 INTERCHANGEABLE
Cap,actuator
5910-00-503-9955220230-001 INTERCHANGEABLE
Capacitor,fixed,paper Dielectric
Air Systems Components Inc Dba Air System Components Inc Div Trion Iaq Div
5950-00-543-936330034 INTERCHANGEABLE
Transformer,power
Freed Transformer Co
3020-00-872-092820666 INTERCHANGEABLE
Gear,spur
Cadillac Gage Textron Inc.
4440-01-112-370530226-01 INTERCHANGEABLE
Wheel Assembly,desiccant
Munters Corporation Dba Munters Des Champs Products Div Cargocaire
3020-01-181-381730034-1416 INTERCHANGEABLE
Gear Cluster
Republic Machinery Co Inc Dba Republic Lagun Machine Tool Co
6110-01-194-255630034 INTERCHANGEABLE
Contactor,magnetic
Wilshire Corp
6130-01-262-401820666 INTERCHANGEABLE
Power Supply
Basic American Inc
Cross-Reference Index
Part NumberManufacturer
20666 Osram Sylvania Inc. (USA)
30034 General Electric Company Dba Ge (USA)
CF10DD/E/841 Osram Sylvania Inc. (USA)
F10DBX/SPX41/4P General Electric Company Dba Ge (USA)
Related Parts
3110-00-100-3165INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
16150
5133-00-189-9291INTERCHANGEABLE
DRILL,TWIST
1650-00-442-8083INTERCHANGEABLE
CAP,ACTUATOR
5910-00-503-9955INTERCHANGEABLE
CAPACITOR,FIXED,PAPER DIELECTRIC
220230-001
5950-00-543-9363INTERCHANGEABLE
TRANSFORMER,POWER
30034
3020-00-872-0928INTERCHANGEABLE
GEAR,SPUR
20666
4440-01-112-3705INTERCHANGEABLE
WHEEL ASSEMBLY,DESICCANT
30226-01
3020-01-181-3817INTERCHANGEABLE
GEAR CLUSTER
30034-1416
6110-01-194-2556INTERCHANGEABLE
CONTACTOR,MAGNETIC
30034
6130-01-262-4018INTERCHANGEABLE
POWER SUPPLY
20666
4330-01-283-5074INTERCHANGEABLE
FILTER ELEMENT,FLUID
20666-6-17
4330-01-288-4011INTERCHANGEABLE
FILTER ELEMENT,FLUID
20666-8-2

Frequently Asked Questions

What is NSN 6240-01-419-5258?

NSN 6240-01-419-5258 is a Lamp,fluorescent, manufactured by Osram Sylvania Inc., classified under FSC 6240 (No Item Name Available). Status: active.

What are the part numbers for NSN 6240-01-419-5258?

NSN 6240-01-419-5258 has 4 cross-referenced part numbers: 20666 (Osram Sylvania Inc.), 30034 (General Electric Company Dba Ge), CF10DD/E/841 (Osram Sylvania Inc.), F10DBX/SPX41/4P (General Electric Company Dba Ge).

What NSN replaces 6240-01-419-5258?

There are 12 known substitutes for 6240-01-419-5258: 3110-00-100-3165, 5133-00-189-9291, 1650-00-442-8083 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20666?

Key specifications for 20666: Emitted Light Characteristic: WHITE; Bulb Designator: T-4; Average Life Rating in Hours: 10000.0; Special Features: ENERGY SAVER; W/O INTERNAL STARTER; 4100K. 10 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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