PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ML550-2Lamp,incandescent

Micro Lamps Inc. · NSN 6240-01-137-4608 · FSC 6240 · No Item Name Available
Verified by PartsTable
NSN 6240-01-137-4608 — this item is cataloged by the U.S. Government under National Stock Number 6240-01-137-4608. Primary manufacturer part number: ML550-2.
Features
  • Lamp,incandescent — FSC 6240
  • Precious Material and Location: BASE GOLD
  • Filament Heavy Duty Service Rating: NOT RATED
  • Emitted Light Characteristic: COLORLESS
  • Average Life Rating in Hours: 10000.0
  • Light Output Rating: 0.120 SPHERICAL CANDLEPOWER NOMINAL SINGLE RATING
  • Light Center Length: 0.187 INCHES NOMINAL IN
  • 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 6240-01-137-4608, is classified within Federal Supply Class 6240 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Micro Lamps Inc.. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6240-01-137-4608
Primary Part NumberML550-2
Item NameLamp,incandescent
FSC / FSG6240 / 62 — No Item Name Available
ManufacturerMicro Lamps Inc.
StatusACTIVE
Precious Material and LocationBASE GOLD
Filament Heavy Duty Service RatingNOT RATED
Emitted Light CharacteristicCOLORLESS
Average Life Rating in Hours10000.0
Light Output Rating0.120 SPHERICAL CANDLEPOWER NOMINAL SINGLE RATING
Light Center Length0.187 INCHES NOMINAL IN
Bulb StyleT (TUBULAR)
Rated Average LifeHOURS
Voltage Rating5.000 VOLTS NOMINAL
Current Rating for Which Designed0.072 AMPERES NOMINAL
Filament DesignationC-6
Base StyleSPECIAL SUB-MIDGET FLANGED
Precious Material and Weight0.040 GOLD GRAINS, TROY
Bulb DesignatorT-7/8
Precious MaterialGOLD
Bulb Light Transmission CharacteristicTRANSPARENT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
3020-00-425-6076200757 INTERCHANGEABLE
Gear,worm
Symbolic Displays, Inc
6730-00-562-1279SMC338805 INTERCHANGEABLE
Reflector Assy,ligh
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5330-00-599-50472255 INTERCHANGEABLE
Seal,plain Encased
Garlock Sealing Technologies Llc Dba Garlock Sealing Technologies Llc
5315-01-069-461861027 INTERCHANGEABLE
Pin
Eaton Aerospace, Llc Dba Jackson South
5360-01-134-00946102-7 INTERCHANGEABLE
Spring
Philadelphia Valve Co
3510-01-412-462961027 INTERCHANGEABLE
Baffle,cylinder,dryer
Ripon Service Parts Center
Cross-Reference Index
Part NumberManufacturer
ML550-2 PRIMARY Micro Lamps Inc. (USA)
6240PL1263016 Jednolity Indeks Materialowy - Uniform Material Index (POL)
716615-001 Raytheon Company Div Rmd Strategic (USA)
61027 Orbit International Corp. Div Orbit Instrument (USA)
A61027 Orbit International Corp. Div Orbit Instrument (USA)
LTX36-2 PRIMARY Wamco, Inc. Dba Wamco Inc (USA)
LTX36-2 PRIMARY Lamptronix Co Ltd (USA)
5205-268 PRIMARY Raytheon Company Div Rmd Strategic (USA)
Related Parts
3020-00-425-6076INTERCHANGEABLE
GEAR,WORM
200757
6730-00-562-1279INTERCHANGEABLE
REFLECTOR ASSY,LIGH
SMC338805
5330-00-599-5047INTERCHANGEABLE
SEAL,PLAIN ENCASED
2255
5315-01-069-4618INTERCHANGEABLE
PIN
61027
5360-01-134-0094INTERCHANGEABLE
SPRING
6102-7
3510-01-412-4629INTERCHANGEABLE
BAFFLE,CYLINDER,DRYER
61027

Frequently Asked Questions

What is NSN 6240-01-137-4608?

NSN 6240-01-137-4608 is a Lamp,incandescent, manufactured by Micro Lamps Inc., classified under FSC 6240 (No Item Name Available). Status: active.

What are the part numbers for NSN 6240-01-137-4608?

NSN 6240-01-137-4608 has 8 cross-referenced part numbers: ML550-2 (Micro Lamps Inc.), 6240PL1263016 (Jednolity Indeks Materialowy - Uniform Material Index), 716615-001 (Raytheon Company Div Rmd Strategic), 61027 (Orbit International Corp. Div Orbit Instrument), A61027 (Orbit International Corp. Div Orbit Instrument) and 3 more.

What NSN replaces 6240-01-137-4608?

There are 6 known substitutes for 6240-01-137-4608: 3020-00-425-6076, 6730-00-562-1279, 5330-00-599-5047 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of ML550-2?

Key specifications for ML550-2: Precious Material and Location: BASE GOLD; Filament Heavy Duty Service Rating: NOT RATED; Emitted Light Characteristic: COLORLESS; Average Life Rating in Hours: 10000.0. 17 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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