PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-DTL-3661/9 MIL-DTL-3661/20Light,indicator

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 6210-01-149-8534 · FSC 6210 · No Item Name Available
Verified by PartsTable
NSN 6210-01-149-8534 — this item is cataloged by the U.S. Government under National Stock Number 6210-01-149-8534. Primary manufacturer part number: MIL-DTL-3661/9 MIL-DTL-3661/20.
Features
  • Light,indicator — FSC 6210
  • Furnished Items and Quantity: 1 HEXAGON NUT AND 1 LOCK WASHER
  • Terminal Type and Quantity: 2 SOLDER LUG
  • Lens Type: DOME, KNURLED, INTERNAL THREAD SINGLE LIGHT FIRST POSITION HORIZONTAL
  • Lens Back Surface Condition: FLUTED SINGLE LIGHT FIRST POSITION HORIZONTAL
  • Lamp Type Accommodated and Quantity: 1 NEON
  • Style Designator: ROUND FRAME, ROUND LENS TYPE
  • 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 6210-01-149-8534, 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 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6210-01-149-8534
Primary Part NumberMIL-DTL-3661/9 MIL-DTL-3661/20
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
Furnished Items and Quantity1 HEXAGON NUT AND 1 LOCK WASHER
Terminal Type and Quantity2 SOLDER LUG
Lens TypeDOME, KNURLED, INTERNAL THREAD SINGLE LIGHT FIRST POSITION HORIZONTAL
Lens Back Surface ConditionFLUTED SINGLE LIGHT FIRST POSITION HORIZONTAL
Lamp Type Accommodated and Quantity1 NEON
Style DesignatorROUND FRAME, ROUND LENS TYPE
Lens Light Transmission CharacteristicTRANSPARENT SINGLE LIGHT FIRST POSITION HORIZONTAL
Lens Face Surface ConditionSMOOTH SINGLE LIGHT FIRST POSITION HORIZONTAL
Mounting MethodPANEL LOCATION NOT OTHERWISE SPECIFIED
Mounting MethodSCREW ON LENS
Lens ColorCOLORLESS SINGLE LIGHT FIRST POSITION HORIZONTAL
Panel Accommodation Hole Diameter0.688 INCHES MINIMUM AND 0.694 INCHES MAXIMUM IN
Lens Quantity1
Lamp Base Type AccommodatedMINIATURE BAYONET
Overall Diameter0.938 INCHES MINIMUM AND 0.968 INCHES MAXIMUM IN
Lamp Bulb Size DesignatorT-3 1/4
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
6210-00-159-1727 INTERCHANGEABLE
Housing,light
6210-00-229-5841 INTERCHANGEABLE
Light,indicator
6210-00-840-1057 INTERCHANGEABLE
Housing,light
6210-00-844-7446 INTERCHANGEABLE
Light,indicator
6210-00-844-7449 INTERCHANGEABLE
Light,indicator
6210-00-989-9884 INTERCHANGEABLE
Housing,light
6210-01-003-8646 INTERCHANGEABLE
Light,indicator
6210-01-056-5164 INTERCHANGEABLE
Light,indicator
Cross-Reference Index
Part NumberManufacturer
MIL-DTL-3661/9 MIL-DTL-3661/20 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-3661/9 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
LH77/1-LC20CN3 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
LH78LC20CN Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-L-3661/9 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-3661/9 AND MIL-L-3661/20 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
6210-00-159-1727INTERCHANGEABLE
HOUSING,LIGHT
6210-00-229-5841INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-840-1057INTERCHANGEABLE
HOUSING,LIGHT
6210-00-844-7446INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-844-7449INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-989-9884INTERCHANGEABLE
HOUSING,LIGHT
6210-01-003-8646INTERCHANGEABLE
LIGHT,INDICATOR
6210-01-056-5164INTERCHANGEABLE
LIGHT,INDICATOR

Frequently Asked Questions

What is NSN 6210-01-149-8534?

NSN 6210-01-149-8534 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 6210-01-149-8534?

NSN 6210-01-149-8534 has 6 cross-referenced part numbers: MIL-DTL-3661/9 MIL-DTL-3661/20 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-3661/9 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), LH77/1-LC20CN3 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), LH78LC20CN (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-L-3661/9 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 1 more.

What NSN replaces 6210-01-149-8534?

There are 8 known substitutes for 6210-01-149-8534: 6210-00-159-1727, 6210-00-229-5841, 6210-00-840-1057 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-DTL-3661/9 MIL-DTL-3661/20?

Key specifications for MIL-DTL-3661/9 MIL-DTL-3661/20: Furnished Items and Quantity: 1 HEXAGON NUT AND 1 LOCK WASHER; Terminal Type and Quantity: 2 SOLDER LUG; Lens Type: DOME, KNURLED, INTERNAL THREAD SINGLE LIGHT FIRST POSITION HORIZONTAL; Lens Back Surface Condition: FLUTED SINGLE LIGHT FIRST POSITION HORIZONTAL. 17 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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