PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

6B1Lamp,incandescent

General Electric Co Miniature Lamp Products Dept Lighting Business Group · NSN 6240-00-186-6608 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-00-186-6608 — this item is cataloged by the U.S. Government under National Stock Number 6240-00-186-6608. Primary manufacturer part number: 6B1.
Features
  • Lamp,incandescent — FSC 6240
  • Base Style: TELEPHONE SLIDE NUMBER TWO
  • Emitted Light Characteristic: WHITE
  • Bulb Designator: T-2
  • Rated Average Life: INDEFINITE LONG
  • Filament Heavy Duty Service Rating: NOT RATED
  • Light Output Rating: 270.000 BEAM CANDLEPOWER NOMINAL SINGLE RATING
  • Bulb Light Transmission Characteristic: TRANSPARENT
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lamp,incandescent, cataloged under National Stock Number 6240-00-186-6608, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is General Electric Co Miniature Lamp Products Dept Lighting Business Group. Government technical data includes 10 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6240-00-186-6608
Primary Part Number6B1
Item NameLamp,incandescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerGeneral Electric Co Miniature Lamp Products Dept Lighting Business Group
StatusACTIVE
Base StyleTELEPHONE SLIDE NUMBER TWO
Emitted Light CharacteristicWHITE
Bulb DesignatorT-2
Rated Average LifeINDEFINITE LONG
Filament Heavy Duty Service RatingNOT RATED
Light Output Rating270.000 BEAM CANDLEPOWER NOMINAL SINGLE RATING
Bulb Light Transmission CharacteristicTRANSPARENT
Current Rating for Which Designed0.310 AMPERES NOMINAL
Bulb StyleT (TUBULAR)
Filament DesignationC-2V V
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5340-00-530-65753296-1 INTERCHANGEABLE
Bumper
Rubbercraft Corporation of California, Ltd. Dba Rubbercraft Corp
4720-00-948-86554810405-3 INTERCHANGEABLE
Hose,nonmetallic
Kalmar AC Inc
Cross-Reference Index
Part NumberManufacturer
6B1 General Electric Co Miniature Lamp Products Dept Lighting Business Group (USA)
4C5491E2 Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir (USA)
C78-391 American National Standards Institute Incorporated Dba American National Standards Institute (USA)
Related Parts
5340-00-530-6575INTERCHANGEABLE
BUMPER
3296-1
4720-00-948-8655INTERCHANGEABLE
HOSE,NONMETALLIC
4810405-3

Frequently Asked Questions

What is NSN 6240-00-186-6608?

NSN 6240-00-186-6608 is a Lamp,incandescent, manufactured by General Electric Co Miniature Lamp Products Dept Lighting Business Group, classified under FSC 6240 (No Item Name Available). Status: active.

What are the part numbers for NSN 6240-00-186-6608?

NSN 6240-00-186-6608 has 3 cross-referenced part numbers: 6B1 (General Electric Co Miniature Lamp Products Dept Lighting Business Group), 4C5491E2 (Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir), C78-391 (American National Standards Institute Incorporated Dba American National Standards Institute).

What NSN replaces 6240-00-186-6608?

There are 2 known substitutes for 6240-00-186-6608: 5340-00-530-6575, 4720-00-948-8655. Verify interchangeability with system specifications before substitution.

What are the specifications of 6B1?

Key specifications for 6B1: Base Style: TELEPHONE SLIDE NUMBER TWO; Emitted Light Characteristic: WHITE; Bulb Designator: T-2; Rated Average Life: INDEFINITE LONG. 11 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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