PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-L-3661Light,indicator

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 6210-00-223-6625 · FSC 6210 · No Item Name Available
Verified by PartsTable
NSN 6210-00-223-6625 — this item is cataloged by the U.S. Government under National Stock Number 6210-00-223-6625. Primary manufacturer part number: MIL-L-3661.
Features
  • Light,indicator — FSC 6210
  • Lamp Base Type Accommodated: MIDGET FLANGED
  • Panel Thickness for Which Designed: 0.188 INCHES MAXIMUM IN
  • Lamp Type Accommodated and Quantity: 1 INCANDESCENT
  • Lens Face Surface Condition: SMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
  • Mounting Method: SCREW IN LENS
  • Lamp Bulb Size Designator: T-1 3/4
  • Lens Light Transmission Characteristic: TRANSPARENT SINGLE LIGHT FIRST POSITION HORIZONTAL
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Light,indicator, cataloged under National Stock Number 6210-00-223-6625, is classified within Federal Supply Class 6210 (No Item Name Available) of the Lighting Fixtures and Lamps group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 18 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6210-00-223-6625
Primary Part NumberMIL-L-3661
Item NameLight,indicator
FSC / FSG6210 / 62 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Lamp Base Type AccommodatedMIDGET FLANGED
Panel Thickness for Which Designed0.188 INCHES MAXIMUM IN
Lamp Type Accommodated and Quantity1 INCANDESCENT
Lens Face Surface ConditionSMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
Mounting MethodSCREW IN LENS
Lamp Bulb Size DesignatorT-1 3/4
Lens Light Transmission CharacteristicTRANSPARENT SINGLE LIGHT FIRST POSITION HORIZONTAL
Lens TypeSTOVEPIPE, SHORT SHANK SINGLE LIGHT FIRST POSITION HORIZONTAL
Panel Accommodation Hole Diameter0.465 INCHES MINIMUM AND 0.471 INCHES MAXIMUM IN
Lens Back Surface ConditionSMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
Transmitted Light ColorCOLORLESS SINGLE LIGHT FIRST POSITION HORIZONTAL FULL DISPLAY DIVISION A
Lens ColorCOLORLESS SINGLE LIGHT FIRST POSITION HORIZONTAL
Lens Quantity1
Terminal Type and Quantity2 SOLDER LUG
Furnished Items and Quantity1 HEXAGON NUT AND 1 LOCK WASHER
Style DesignatorROUND FRAME, ROUND LENS TYPE
Mounting MethodPANEL LOCATION NOT OTHERWISE SPECIFIED
Overall Diameter0.641 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
6210-01-003-0259 INTERCHANGEABLE
Light,indicator
6210-01-003-4277 INTERCHANGEABLE
Light,indicator
6210-01-053-5100 INTERCHANGEABLE
Light,indicator
6210-01-165-8775 INTERCHANGEABLE
Light,indicator
6210-01-248-2243 INTERCHANGEABLE
Light,indicator
Cross-Reference Index
Part NumberManufacturer
MIL-L-3661 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-L-3661/35 MIL-DTL-3661/47 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-3661/35 MIL-DTL-3661/47 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
LH89/1-LC35CN2 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
6210-01-003-0259INTERCHANGEABLE
LIGHT,INDICATOR
6210-01-003-4277INTERCHANGEABLE
LIGHT,INDICATOR
6210-01-053-5100INTERCHANGEABLE
LIGHT,INDICATOR
6210-01-165-8775INTERCHANGEABLE
LIGHT,INDICATOR
6210-01-248-2243INTERCHANGEABLE
LIGHT,INDICATOR

Frequently Asked Questions

What is NSN 6210-00-223-6625?

NSN 6210-00-223-6625 is a Light,indicator, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 6210 (No Item Name Available). Status: active.

What are the part numbers for NSN 6210-00-223-6625?

NSN 6210-00-223-6625 has 4 cross-referenced part numbers: MIL-L-3661 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-L-3661/35 MIL-DTL-3661/47 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-3661/35 MIL-DTL-3661/47 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), LH89/1-LC35CN2 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6210-00-223-6625?

There are 5 known substitutes for 6210-00-223-6625: 6210-01-003-0259, 6210-01-003-4277, 6210-01-053-5100 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-L-3661?

Key specifications for MIL-L-3661: Lamp Base Type Accommodated: MIDGET FLANGED; Panel Thickness for Which Designed: 0.188 INCHES MAXIMUM IN; Overall Length: 1.234 INCHES MAXIMUM IN; Lamp Type Accommodated and Quantity: 1 INCANDESCENT. 19 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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