PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C566-299Galilean Eyepiece C

Northrop Grumman Systems Corporation · NSN 2040-00-896-6787 · FSC 2040 · No Item Name Available
Verified by PartsTable
NSN 2040-00-896-6787 — this item is cataloged by the U.S. Government under National Stock Number 2040-00-896-6787. Primary manufacturer part number: C566-299.
Features
  • Galilean Eyepiece C — FSC 2040
  • 4 verified cross-references
  • Primary manufacturer: Northrop Grumman Systems Corporation
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Galilean Eyepiece C, cataloged under National Stock Number 2040-00-896-6787, is classified within Federal Supply Class 2040 (No Item Name Available) of the Ship and Marine Equipment group. The primary manufacturer of record is Northrop Grumman Systems Corporation. This item has 4 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
NSN2040-00-896-6787
Primary Part NumberC566-299
Item NameGalilean Eyepiece C
FSC / FSG2040 / 20 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5961-00-076-6459 INTERCHANGEABLE
Semiconductor Device,photo
5930-00-175-458902-16-009 INTERCHANGEABLE
Switch,thermostatic
Hatco Corp
6625-00-190-48684934 INTERCHANGEABLE
Transducer Assembly
Precision Electronics, Inc
5330-00-298-6529RE49F212-6 INTERCHANGEABLE
Gasket
Naval Ship Systems Command
5945-00-883-9480 INTERCHANGEABLE
Relay,electromagnetic
4720-01-017-26434934 INTERCHANGEABLE
Hose,nonmetallic
Pentair Filtration Solutions, Llc
5915-01-029-3739 INTERCHANGEABLE
Filter,low Pass
5340-01-392-1019 INTERCHANGEABLE
Insert and Tool Assortment,screw
5130-01-393-15904934 INTERCHANGEABLE
Socket,socket Wrench
Wright Tool Co
5305-01-498-78804934 INTERCHANGEABLE
Screw,machine
Amw Cuyuna Engine Co. Inc Dba Two Stroke International
Cross-Reference Index
Part NumberManufacturer
C566-299 PRIMARY Northrop Grumman Systems Corporation (USA)
C566-299 PRIMARY L3 Technologies, Inc. Div L3 Keo (USA)
4934 PRIMARY L3 Technologies, Inc. Div L3 Keo (USA)
566C004934 PRIMARY L3 Technologies, Inc. Div L3 Keo (USA)
Related Parts
5961-00-076-6459INTERCHANGEABLE
SEMICONDUCTOR DEVICE,PHOTO
5930-00-175-4589INTERCHANGEABLE
SWITCH,THERMOSTATIC
02-16-009
6625-00-190-4868INTERCHANGEABLE
TRANSDUCER ASSEMBLY
4934
5330-00-298-6529INTERCHANGEABLE
GASKET
RE49F212-6
5945-00-883-9480INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
4720-01-017-2643INTERCHANGEABLE
HOSE,NONMETALLIC
4934
5915-01-029-3739INTERCHANGEABLE
FILTER,LOW PASS
5340-01-392-1019INTERCHANGEABLE
INSERT AND TOOL ASSORTMENT,SCREW
5130-01-393-1590INTERCHANGEABLE
SOCKET,SOCKET WRENCH
4934
5305-01-498-7880INTERCHANGEABLE
SCREW,MACHINE
4934
6515-01-556-0098INTERCHANGEABLE
ENDOSCOPIC INSTRUMENT,FIBER OPTI
5180-01-581-5204INTERCHANGEABLE
TOOL KIT,ELECTRONIC SYSTEM
4934

Frequently Asked Questions

What is NSN 2040-00-896-6787?

NSN 2040-00-896-6787 is a Galilean Eyepiece C, manufactured by Northrop Grumman Systems Corporation, classified under FSC 2040 (No Item Name Available). Status: active.

What are the part numbers for NSN 2040-00-896-6787?

NSN 2040-00-896-6787 has 4 cross-referenced part numbers: C566-299 (Northrop Grumman Systems Corporation), C566-299 (L3 Technologies, Inc. Div L3 Keo), 4934 (L3 Technologies, Inc. Div L3 Keo), 566C004934 (L3 Technologies, Inc. Div L3 Keo).

What NSN replaces 2040-00-896-6787?

There are 12 known substitutes for 2040-00-896-6787: 5961-00-076-6459, 5930-00-175-4589, 6625-00-190-4868 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of C566-299?

Key specifications for C566-299: End Item Identification: HEAD SKELETON,PERIS. 1 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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