PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS3338-6839AS25Lamp,incandescent

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 6240-01-399-4105 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-01-399-4105 — this item is cataloged by the U.S. Government under National Stock Number 6240-01-399-4105. Primary manufacturer part number: MS3338-6839AS25.
Features
  • Lamp,incandescent — FSC 6240
  • Bulb Style: T (TUBULAR)
  • Current Rating for Which Designed: 0.024 AMPERES NOMINAL
  • Voltage Rating: 28.000 VOLTS NOMINAL
  • Average Life Rating in Hours: 4000.0
  • 2 verified cross-references
  • Primary manufacturer: Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lamp,incandescent, cataloged under National Stock Number 6240-01-399-4105, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 4 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6240-01-399-4105
Primary Part NumberMS3338-6839AS25
Item NameLamp,incandescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Bulb StyleT (TUBULAR)
Current Rating for Which Designed0.024 AMPERES NOMINAL
Voltage Rating28.000 VOLTS NOMINAL
Average Life Rating in Hours4000.0
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
6240-00-143-3142 INTERCHANGEABLE
Lamp,incandescent
6240-00-143-6558 INTERCHANGEABLE
Lamp,incandescent
6240-00-155-7836 INTERCHANGEABLE
Lamp,incandescent
6240-00-196-44706-6AT10-1P INTERCHANGEABLE
Lamp,incandescent
General Electric Company Dba Ge
6240-00-196-4472 INTERCHANGEABLE
Lamp,incandescent
6240-00-556-80121200T20 INTERCHANGEABLE
Lamp,incandescent
American National Standards Institute Incorporated Dba American National Standards Institute
6240-00-660-8849 INTERCHANGEABLE
Lamp,incandescent
Cross-Reference Index
Part NumberManufacturer
MS3338-6839AS25 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
MIL-L-6363 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
6240-00-143-3142INTERCHANGEABLE
LAMP,INCANDESCENT
6240-00-143-6558INTERCHANGEABLE
LAMP,INCANDESCENT
6240-00-155-7836INTERCHANGEABLE
LAMP,INCANDESCENT
6240-00-196-4470INTERCHANGEABLE
LAMP,INCANDESCENT
6-6AT10-1P
6240-00-196-4472INTERCHANGEABLE
LAMP,INCANDESCENT
6240-00-556-8012INTERCHANGEABLE
LAMP,INCANDESCENT
1200T20
6240-00-660-8849INTERCHANGEABLE
LAMP,INCANDESCENT

Frequently Asked Questions

What is NSN 6240-01-399-4105?

NSN 6240-01-399-4105 is a Lamp,incandescent, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 6240 (No Item Name Available). Status: active.

What are the part numbers for NSN 6240-01-399-4105?

NSN 6240-01-399-4105 has 2 cross-referenced part numbers: MS3338-6839AS25 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), MIL-L-6363 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6240-01-399-4105?

There are 7 known substitutes for 6240-01-399-4105: 6240-00-143-3142, 6240-00-143-6558, 6240-00-155-7836 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MS3338-6839AS25?

Key specifications for MS3338-6839AS25: Bulb Style: T (TUBULAR); Current Rating for Which Designed: 0.024 AMPERES NOMINAL; Voltage Rating: 28.000 VOLTS NOMINAL; Average Life Rating in Hours: 4000.0. 5 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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