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 6210-00-845-5496 · FSC 6210 · No Item Name Available
Verified by PartsTable
NSN 6210-00-845-5496 — this item is cataloged by the U.S. Government under National Stock Number 6210-00-845-5496. Primary manufacturer part number: MIL-L-3661.
Features
  • Light,indicator — FSC 6210
  • Panel Accommodation Hole Diameter: 0.688 INCHES MINIMUM AND 0.694 INCHES MAXIMUM IN
  • Lens Color: YELLOW SINGLE LIGHT FIRST POSITION HORIZONTAL
  • Lens Face Surface Condition: SMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
  • Lens Back Surface Condition: FROSTED SINGLE LIGHT FIRST POSITION HORIZONTAL
  • Style Designator: ROUND FRAME, ROUND LENS TYPE
  • Lamp Type Accommodated and Quantity: 1 INCANDESCENT
  • Terminal Type and Quantity: 2 SOLDER LUG
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Light,indicator, cataloged under National Stock Number 6210-00-845-5496, 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 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 1 manufacturer, 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
NSN6210-00-845-5496
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
Panel Accommodation Hole Diameter0.688 INCHES MINIMUM AND 0.694 INCHES MAXIMUM IN
Lens ColorYELLOW SINGLE LIGHT FIRST POSITION HORIZONTAL
Lens Face Surface ConditionSMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
Lens Back Surface ConditionFROSTED SINGLE LIGHT FIRST POSITION HORIZONTAL
Style DesignatorROUND FRAME, ROUND LENS TYPE
Lamp Type Accommodated and Quantity1 INCANDESCENT
Terminal Type and Quantity2 SOLDER LUG
Features ProvidedBLACKOUT DEGREE, COMPLETE AND DIMMING DEVICE
Furnished Items and Quantity1 GASKET AND 1 HEXAGON NUT AND 1 LOCK WASHER
Transmitted Light ColorYELLOW SINGLE LIGHT FIRST POSITION HORIZONTAL FULL DISPLAY DIVISION A
Mounting MethodSCREW IN LENS
Lens TypeCONVEX, KNURLED, THREADED SHANK SINGLE LIGHT FIRST POSITION HORIZONTAL
Lens Light Transmission CharacteristicTRANSLUCENT SINGLE LIGHT FIRST POSITION HORIZONTAL
Mounting MethodPANEL LOCATION NOT OTHERWISE SPECIFIED
Lamp Bulb Size DesignatorT-3 1/4
Overall Diameter0.938 INCHES MINIMUM AND 0.968 INCHES MAXIMUM IN
Lamp Base Type AccommodatedMINIATURE BAYONET
Hazardous Locations/environmental ProtectionDRIPPROOF
Lens Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6210-00-022-5992 INTERCHANGEABLE
Light,indicator
6210-00-067-8375 INTERCHANGEABLE
Lens,light
6210-00-067-8378 INTERCHANGEABLE
Lens,light
6210-00-519-1978 INTERCHANGEABLE
Light,indicator
6210-00-617-1491 INTERCHANGEABLE
Light,indicator
6210-00-811-8377 INTERCHANGEABLE
Lens,light
6210-00-842-6939 INTERCHANGEABLE
Lens,light
6210-00-843-5379 INTERCHANGEABLE
Lens,light
6210-00-845-5494 INTERCHANGEABLE
Light,indicator
6210-00-865-3450 INTERCHANGEABLE
Lens,light
Cross-Reference Index
Part NumberManufacturer
MIL-L-3661 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
LH76/3-LC17YD3 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
LH75LC17YD Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-3661/17 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-3661/8 MIL-DTL-3661/17 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
6210-00-022-5992INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-067-8375INTERCHANGEABLE
LENS,LIGHT
6210-00-067-8378INTERCHANGEABLE
LENS,LIGHT
6210-00-519-1978INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-617-1491INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-811-8377INTERCHANGEABLE
LENS,LIGHT
6210-00-842-6939INTERCHANGEABLE
LENS,LIGHT
6210-00-843-5379INTERCHANGEABLE
LENS,LIGHT
6210-00-845-5494INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-865-3450INTERCHANGEABLE
LENS,LIGHT
6210-00-894-2388INTERCHANGEABLE
LENS,LIGHT
6210-00-914-9543INTERCHANGEABLE
LENS,LIGHT

Frequently Asked Questions

What is NSN 6210-00-845-5496?

NSN 6210-00-845-5496 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 6210-00-845-5496?

NSN 6210-00-845-5496 has 5 cross-referenced part numbers: MIL-L-3661 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), LH76/3-LC17YD3 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), LH75LC17YD (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-3661/17 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-3661/8 MIL-DTL-3661/17 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6210-00-845-5496?

There are 12 known substitutes for 6210-00-845-5496: 6210-00-022-5992, 6210-00-067-8375, 6210-00-067-8378 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-L-3661?

Key specifications for MIL-L-3661: Panel Accommodation Hole Diameter: 0.688 INCHES MINIMUM AND 0.694 INCHES MAXIMUM IN; Lens Color: YELLOW SINGLE LIGHT FIRST POSITION HORIZONTAL; Lens Face Surface Condition: SMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL; Special Features: DIM ARROW SYMBOL CW AND BRIGHT ARROW SYMBOL CCW. 21 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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