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 6210-00-989-7739 · FSC 6210 · No Item Name Available
Verified by PartsTable
NSN 6210-00-989-7739 — this item is cataloged by the U.S. Government under National Stock Number 6210-00-989-7739. Primary manufacturer part number: MIL-L-3661.
Features
  • Light,indicator — FSC 6210
  • Lamp Base Type Accommodated: MIDGET FLANGED
  • Panel Accommodation Hole Diameter: 0.469 INCHES NOMINAL IN
  • Lens Color: RED, IDENTIFICATION SINGLE LIGHT FIRST POSITION HORIZONTAL
  • Lamp Bulb Size Designator: T-1 3/4
  • Furnished Items and Quantity: 1 HEXAGON NUT AND 1 LOCK WASHER
  • Mounting Method: PANEL LOCATION NOT OTHERWISE SPECIFIED
  • Mounting Method: SCREW IN LENS
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
  • Applications requiring Steel Body construction
General Description

The Light,indicator, cataloged under National Stock Number 6210-00-989-7739, 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 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 17 commercial cross-references from 8 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6210-00-989-7739
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
StatusCANCELLED
Lamp Base Type AccommodatedMIDGET FLANGED
Panel Accommodation Hole Diameter0.469 INCHES NOMINAL IN
Lens ColorRED, IDENTIFICATION SINGLE LIGHT FIRST POSITION HORIZONTAL
Lamp Bulb Size DesignatorT-1 3/4
Furnished Items and Quantity1 HEXAGON NUT AND 1 LOCK WASHER
Mounting MethodPANEL LOCATION NOT OTHERWISE SPECIFIED
Mounting MethodSCREW IN LENS
Lens Back Surface ConditionSMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
Transmitted Light ColorRED, IDENTIFICATION SINGLE LIGHT FIRST POSITION HORIZONTAL FULL DISPLAY DIVISION A
MaterialSTEEL BODY
Style DesignatorROUND FRAME, ROUND LENS TYPE
Lens Face Surface ConditionSMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
Panel Thickness for Which Designed0.188 INCHES MAXIMUM IN
Lamp Type Accommodated and Quantity1 INCANDESCENT
Terminal Type and Quantity2 SOLDER LUG
Lens Light Transmission CharacteristicTRANSLUCENT SINGLE LIGHT FIRST POSITION HORIZONTAL
Lens TypeSTOVEPIPE, EXTERNAL THREAD SINGLE LIGHT FIRST POSITION HORIZONTAL
Hazardous Locations/environmental ProtectionDUSTTIGHT
Overall Diameter0.548 INCHES MINIMUM AND 0.553 INCHES MAXIMUM IN
Lens Quantity1
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
6210-00-058-5120 INTERCHANGEABLE
Light,indicator
6210-00-438-2234 INTERCHANGEABLE
Housing,light
6210-00-442-7537 INTERCHANGEABLE
Light,indicator
6210-00-476-6993 INTERCHANGEABLE
Light,indicator
6210-00-717-2900 INTERCHANGEABLE
Light,indicator
6210-00-724-2447 INTERCHANGEABLE
Light,indicator
6210-00-726-3608 INTERCHANGEABLE
Light,indicator
6210-00-813-8265 INTERCHANGEABLE
Housing,light
6210-01-006-5768 INTERCHANGEABLE
Light,indicator
6210-01-029-3353 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-DTL-3661/5 MIL-DTL-3661/12 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
L14005BR1 Safran Power Usa, Llc (USA)
413958-1 Raytheon Company Dba Raytheon (USA)
LH70LC12RT Zf Industrieantriebe Witten Gmbh (DEU)
162-8430-971 Northrop Grumman Systems Corporation (USA)
8851837 Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Us Army Research, Development and Engineering Command Armament (USA)
LH73LC12RD Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-3661/5 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
LH73LC12RT Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
LH73LC12RT2 Zf Industrieantriebe Witten Gmbh (DEU)
MIL-DTL-3661/5 AND MIL-L-3661/12 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
LH73/1-LC12RT2 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
6210PL0826818 Jednolity Indeks Materialowy - Uniform Material Index (POL)
359-8430-0971-502 Dialight Corporation (USA)
LH73/1-LC12RT-2 Zf Industrieantriebe Witten Gmbh (DEU)
418284-7 Raytheon Company Dba Raytheon (USA)
Related Parts
6210-00-058-5120INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-438-2234INTERCHANGEABLE
HOUSING,LIGHT
6210-00-442-7537INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-476-6993INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-717-2900INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-724-2447INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-726-3608INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-813-8265INTERCHANGEABLE
HOUSING,LIGHT
6210-01-006-5768INTERCHANGEABLE
LIGHT,INDICATOR
6210-01-029-3353INTERCHANGEABLE
LIGHT,INDICATOR
6210-01-037-1265INTERCHANGEABLE
LIGHT,INDICATOR
6210-01-057-3264INTERCHANGEABLE
LIGHT,INDICATOR

Frequently Asked Questions

What is NSN 6210-00-989-7739?

NSN 6210-00-989-7739 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: cancelled.

What are the part numbers for NSN 6210-00-989-7739?

NSN 6210-00-989-7739 has 17 cross-referenced part numbers: MIL-L-3661 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-3661/5 MIL-DTL-3661/12 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), L14005BR1 (Safran Power Usa, Llc), 413958-1 (Raytheon Company Dba Raytheon), LH70LC12RT (Zf Industrieantriebe Witten Gmbh) and 12 more.

What NSN replaces 6210-00-989-7739?

There are 12 known substitutes for 6210-00-989-7739: 6210-00-058-5120, 6210-00-438-2234, 6210-00-442-7537 and 9 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 Accommodation Hole Diameter: 0.469 INCHES NOMINAL IN; Lens Color: RED, IDENTIFICATION SINGLE LIGHT FIRST POSITION HORIZONTAL; Lamp Bulb Size Designator: T-1 3/4. 21 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6210-00-989-7739 still in active supply?

NSN 6210-00-989-7739 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com