PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-L-3661/17Lens,light

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 6210-00-865-3450 · FSC 6210 · No Item Name Available
Verified by PartsTable
NSN 6210-00-865-3450 — this item is cataloged by the U.S. Government under National Stock Number 6210-00-865-3450. Primary manufacturer part number: MIL-L-3661/17.
Features
  • Lens,light — FSC 6210
  • Effective Diameter: 0.470 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN
  • Inscription: DIM ARROW SYMBOL CW AND BRIGHT ARROW SYMBOL CCW HOLDER
  • Color: BLACK HOLDER
  • Style Designator: CONVEX
  • Thread Quantity: 27 PER INCH
  • Hazardous Locations/environmental Protection: DRIPPROOF
  • Color: BLACK INSCRIPTION BACKGROUND
Applications
  • Area illumination
  • Indicator and warning display
  • Navigation and signal lighting
  • Applications requiring Plastic Lens construction
General Description

The Lens,light, cataloged under National Stock Number 6210-00-865-3450, 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 23 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6210-00-865-3450
Primary Part NumberMIL-L-3661/17
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
Effective Diameter0.470 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN
InscriptionDIM ARROW SYMBOL CW AND BRIGHT ARROW SYMBOL CCW HOLDER
ColorBLACK HOLDER
Style DesignatorCONVEX
Thread Quantity27 PER INCH
Hazardous Locations/environmental ProtectionDRIPPROOF
ColorBLACK INSCRIPTION BACKGROUND
Dimming Device TypeMECHANICAL SHUTTER
Thread Class2A A
Furnished ItemsGASKET
Mounting MethodEXTERNAL THREAD
ColorRED, IDENTIFICATION LENS
Thread Diameter0.562 INCHES IN
Thread DirectionRIGHT-HAND
ColorBLACK INSCRIPTION
Thread SeriesUNS
Mounting Device Quantity1
Blackout DegreeCOMPLETE
Surface ConditionSMOOTH FACE
MaterialPLASTIC LENS
Surface ConditionFROSTED BACK
Light Transmission DesignTRANSLUCENT LENS
Overall Diameter0.780 INCHES MINIMUM AND 0.840 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6210-00-022-5992 INTERCHANGEABLE
Light,indicator
6210-00-067-8373 INTERCHANGEABLE
Lens,light
6210-00-067-8375 INTERCHANGEABLE
Lens,light
6210-00-067-8378 INTERCHANGEABLE
Lens,light
6210-00-233-5340207-0410-0111-201 INTERCHANGEABLE
Light,indicator
Dialight Corporation
6210-00-519-1978 INTERCHANGEABLE
Light,indicator
6210-00-617-1491 INTERCHANGEABLE
Light,indicator
6210-00-811-8377 INTERCHANGEABLE
Lens,light
6210-00-842-6939 INTERCHANGEABLE
Lens,light
6210-00-843-5379 INTERCHANGEABLE
Lens,light
Cross-Reference Index
Part NumberManufacturer
MIL-L-3661/17 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
203-0111-203 Dialight Corporation (USA)
LC17RD3 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-DTL-3661/17 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
98B410-111 Dialight Corporation (USA)
LC17RD1 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
6210-00-022-5992INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-067-8373INTERCHANGEABLE
LENS,LIGHT
6210-00-067-8375INTERCHANGEABLE
LENS,LIGHT
6210-00-067-8378INTERCHANGEABLE
LENS,LIGHT
6210-00-233-5340INTERCHANGEABLE
LIGHT,INDICATOR
207-0410-0111-201
6210-00-519-1978INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-617-1491INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-811-8377INTERCHANGEABLE
LENS,LIGHT
6210-00-842-6939INTERCHANGEABLE
LENS,LIGHT
6210-00-843-5379INTERCHANGEABLE
LENS,LIGHT
6210-00-845-5494INTERCHANGEABLE
LIGHT,INDICATOR
6210-00-845-5496INTERCHANGEABLE
LIGHT,INDICATOR

Frequently Asked Questions

What is NSN 6210-00-865-3450?

NSN 6210-00-865-3450 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 6210-00-865-3450?

NSN 6210-00-865-3450 has 6 cross-referenced part numbers: MIL-L-3661/17 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 203-0111-203 (Dialight Corporation), LC17RD3 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-DTL-3661/17 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 98B410-111 (Dialight Corporation) and 1 more.

What NSN replaces 6210-00-865-3450?

There are 12 known substitutes for 6210-00-865-3450: 6210-00-022-5992, 6210-00-067-8373, 6210-00-067-8375 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-L-3661/17?

Key specifications for MIL-L-3661/17: Effective Diameter: 0.470 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN; Inscription: DIM ARROW SYMBOL CW AND BRIGHT ARROW SYMBOL CCW HOLDER; Color: BLACK HOLDER; Style Designator: CONVEX. 24 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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