PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-3661/18Light,indicator

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 6210-01-071-8219 · FSC 6210 · No Item Name Available
Verified by PartsTable
NSN 6210-01-071-8219 — this item is cataloged by the U.S. Government under National Stock Number 6210-01-071-8219. Primary manufacturer part number: MIL-DTL-3661/18.
Features
  • Light,indicator — FSC 6210
  • Panel Accommodation Hole Diameter: 0.688 INCHES MINIMUM AND 0.694 INCHES MAXIMUM IN
  • Lens Color: RED SINGLE LIGHT FIRST POSITION HORIZONTAL
  • Lamp Bulb Size Designator: T-3 1/4
  • Lens Back Surface Condition: SMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
  • Furnished Items and Quantity: 1 HEXAGON NUT AND 1 LOCK WASHER
  • Mounting Method: PANEL LOCATION NOT OTHERWISE SPECIFIED
  • 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 6210-01-071-8219, 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 17 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6210-01-071-8219
Primary Part NumberMIL-DTL-3661/18
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 ColorRED SINGLE LIGHT FIRST POSITION HORIZONTAL
Lamp Bulb Size DesignatorT-3 1/4
Lens Back Surface ConditionSMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
Furnished Items and Quantity1 HEXAGON NUT AND 1 LOCK WASHER
Mounting MethodPANEL LOCATION NOT OTHERWISE SPECIFIED
Lens Light Transmission CharacteristicTRANSPARENT SINGLE LIGHT FIRST POSITION HORIZONTAL
Lamp Type Accommodated and Quantity1 INCANDESCENT
Transmitted Light ColorRED SINGLE LIGHT FIRST POSITION HORIZONTAL FULL DISPLAY DIVISION A
Lens Face Surface ConditionSMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
Terminal Type and Quantity2 TAB, SOLDER LUG
Lens TypeCONVEX, KNURLED, THREADED SHANK SINGLE LIGHT FIRST POSITION HORIZONTAL
Mounting MethodSCREW IN LENS
Style DesignatorROUND FRAME, ROUND LENS TYPE
Overall Diameter0.810 INCHES NOMINAL IN
Lens Quantity1
Lamp Base Type AccommodatedMINIATURE BAYONET
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
6210-00-056-9192 INTERCHANGEABLE
Lens,light
6210-00-067-8370 INTERCHANGEABLE
Lens,light
6210-00-067-8371 INTERCHANGEABLE
Lens,light
6210-00-067-8372 INTERCHANGEABLE
Lens,light
6210-00-080-1058 INTERCHANGEABLE
Light,indicator
6210-00-810-7583 INTERCHANGEABLE
Light,indicator
6210-00-857-2338 INTERCHANGEABLE
Lens,light
6210-00-892-2380 INTERCHANGEABLE
Light,indicator
6210-00-996-0675202-0410-0113-203 INTERCHANGEABLE
Light,indicator
Dialight Corporation
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-3661/18 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
LA76-3LC18RN3 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
LH76/3-LC18RN3 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-3661/8 MIL-DTL-3661/18 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
6210-00-056-9192INTERCHANGEABLE
LENS,LIGHT
6210-00-067-8370INTERCHANGEABLE
LENS,LIGHT
6210-00-067-8371INTERCHANGEABLE
LENS,LIGHT
6210-00-067-8372INTERCHANGEABLE
LENS,LIGHT
6210-00-080-1058INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-810-7583INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-857-2338INTERCHANGEABLE
LENS,LIGHT
6210-00-892-2380INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-996-0675INTERCHANGEABLE
LIGHT,INDICATOR
202-0410-0113-203

Frequently Asked Questions

What is NSN 6210-01-071-8219?

NSN 6210-01-071-8219 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 6210-01-071-8219?

NSN 6210-01-071-8219 has 5 cross-referenced part numbers: MIL-DTL-3661/18 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), LA76-3LC18RN3 (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), LH76/3-LC18RN3 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-3661/8 MIL-DTL-3661/18 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6210-01-071-8219?

There are 9 known substitutes for 6210-01-071-8219: 6210-00-056-9192, 6210-00-067-8370, 6210-00-067-8371 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-3661/18?

Key specifications for MIL-DTL-3661/18: Panel Accommodation Hole Diameter: 0.688 INCHES MINIMUM AND 0.694 INCHES MAXIMUM IN; Lens Color: RED SINGLE LIGHT FIRST POSITION HORIZONTAL; Lamp Bulb Size Designator: T-3 1/4; Lens Back Surface Condition: SMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL. 18 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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