PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-L-3661/25Lens,light

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 6210-01-413-8777 · FSC 6210 · No Item Name Available
Verified by PartsTable
NSN 6210-01-413-8777 — this item is cataloged by the U.S. Government under National Stock Number 6210-01-413-8777. Primary manufacturer part number: MIL-L-3661/25.
Features
  • Lens,light — FSC 6210
  • Thread Series: UNEF
  • Thread Class: 2A A
  • Effective Diameter: 11.910 MILLIMETERS NOMINAL MM
  • Thread Quantity: 32 PER INCH
  • Thread Length: 0.938 INCHES NOMINAL IN
  • Style Designator: FLAT
  • Mounting Method: THREAD
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
General Description

The Lens,light, cataloged under National Stock Number 6210-01-413-8777, 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 7 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6210-01-413-8777
Primary Part NumberMIL-L-3661/25
Item NameLens,light
FSC / FSG6210 / 62 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Thread SeriesUNEF
Thread Class2A A
Effective Diameter11.910 MILLIMETERS NOMINAL MM
Thread Quantity32 PER INCH
Thread Length0.938 INCHES NOMINAL IN
Style DesignatorFLAT
Mounting MethodTHREAD
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
6210-00-001-1438 INTERCHANGEABLE
Lens,light
6210-00-150-2002 INTERCHANGEABLE
Lens,light
6210-00-625-3901 INTERCHANGEABLE
Lens,light
6210-00-625-3904 INTERCHANGEABLE
Lens,light
6210-01-014-3439 INTERCHANGEABLE
Lens,light
6210-01-030-2332 INTERCHANGEABLE
Lens,light
6210-01-133-9588 INTERCHANGEABLE
Lens,light
6210-01-413-8776 INTERCHANGEABLE
Lens,light
6210-01-434-4578 INTERCHANGEABLE
Lens,light
Cross-Reference Index
Part NumberManufacturer
MIL-L-3661/25 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
M3661/25-LC25RN2 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-3661/25 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
6210-00-001-1438INTERCHANGEABLE
LENS,LIGHT
6210-00-150-2002INTERCHANGEABLE
LENS,LIGHT
6210-00-625-3901INTERCHANGEABLE
LENS,LIGHT
6210-00-625-3904INTERCHANGEABLE
LENS,LIGHT
6210-01-014-3439INTERCHANGEABLE
LENS,LIGHT
6210-01-030-2332INTERCHANGEABLE
LENS,LIGHT
6210-01-133-9588INTERCHANGEABLE
LENS,LIGHT
6210-01-413-8776INTERCHANGEABLE
LENS,LIGHT
6210-01-434-4578INTERCHANGEABLE
LENS,LIGHT

Frequently Asked Questions

What is NSN 6210-01-413-8777?

NSN 6210-01-413-8777 is a Lens,light, 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 6210-01-413-8777?

NSN 6210-01-413-8777 has 3 cross-referenced part numbers: MIL-L-3661/25 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), M3661/25-LC25RN2 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-3661/25 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 6210-01-413-8777?

There are 9 known substitutes for 6210-01-413-8777: 6210-00-001-1438, 6210-00-150-2002, 6210-00-625-3901 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-L-3661/25?

Key specifications for MIL-L-3661/25: Thread Series: UNEF; Thread Class: 2A A; Effective Diameter: 11.910 MILLIMETERS NOMINAL MM; Thread Quantity: 32 PER INCH. 8 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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