PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-3661/37 MIL-DTL-3661/47Light,indicator

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 6210-01-066-5527 · FSC 6210 · No Item Name Available
Verified by PartsTable
NSN 6210-01-066-5527 — this item is cataloged by the U.S. Government under National Stock Number 6210-01-066-5527. Primary manufacturer part number: MIL-DTL-3661/37 MIL-DTL-3661/47.
Features
  • Light,indicator — FSC 6210
  • Lamp Bulb Size Designator: T-1 3/4
  • Lens Quantity: 1
  • Lens Color: WHITE SINGLE LIGHT FIRST POSITION HORIZONTAL
  • Panel Accommodation Hole Diameter: 0.468 INCHES NOMINAL IN
  • Lens Face Surface Condition: SMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
  • Features Provided: BLACKOUT DEGREE, PARTIAL AND DIMMING DEVICE
  • Transmitted Light Color: WHITE SINGLE LIGHT FIRST POSITION HORIZONTAL FULL DISPLAY DIVISION A
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
  • Applications requiring Aluminum Body construction
General Description

The Light,indicator, cataloged under National Stock Number 6210-01-066-5527, 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 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6210-01-066-5527
Primary Part NumberMIL-DTL-3661/37 MIL-DTL-3661/47
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 Bulb Size DesignatorT-1 3/4
Lens Quantity1
Lens ColorWHITE SINGLE LIGHT FIRST POSITION HORIZONTAL
Panel Accommodation Hole Diameter0.468 INCHES NOMINAL IN
Lens Face Surface ConditionSMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
Features ProvidedBLACKOUT DEGREE, PARTIAL AND DIMMING DEVICE
Transmitted Light ColorWHITE SINGLE LIGHT FIRST POSITION HORIZONTAL FULL DISPLAY DIVISION A
Lens TypeCONVEX, KNURLED, THREADED SHANK SINGLE LIGHT FIRST POSITION HORIZONTAL
Mounting MethodSCREW ON LENS
Mounting MethodPANEL LOCATION NOT OTHERWISE SPECIFIED
Lamp Type Accommodated and Quantity1 INCANDESCENT
Lens Back Surface ConditionSMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
MaterialALUMINUM BODY
Style DesignatorROUND FRAME, ROUND LENS TYPE
Lens Light Transmission CharacteristicTRANSLUCENT SINGLE LIGHT FIRST POSITION HORIZONTAL
Terminal Type and Quantity2 TAB, SOLDER LUG
Lamp Base Type AccommodatedMIDGET FLANGED
Hazardous Locations/environmental ProtectionWATERTIGHT
Overall Diameter0.641 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
6210-01-089-3799 INTERCHANGEABLE
Light,indicator
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-3661/37 MIL-DTL-3661/47 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-L-3661 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
LH89/1-LC37WT1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
6210-01-089-3799INTERCHANGEABLE
LIGHT,INDICATOR

Frequently Asked Questions

What is NSN 6210-01-066-5527?

NSN 6210-01-066-5527 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 6210-01-066-5527?

NSN 6210-01-066-5527 has 3 cross-referenced part numbers: MIL-DTL-3661/37 MIL-DTL-3661/47 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-L-3661 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), LH89/1-LC37WT1 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6210-01-066-5527?

There is 1 known substitute for 6210-01-066-5527: 6210-01-089-3799. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-3661/37 MIL-DTL-3661/47?

Key specifications for MIL-DTL-3661/37 MIL-DTL-3661/47: Lamp Bulb Size Designator: T-1 3/4; Lens Quantity: 1; Lens Color: WHITE SINGLE LIGHT FIRST POSITION HORIZONTAL; Panel Accommodation Hole Diameter: 0.468 INCHES NOMINAL IN. 20 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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