PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

11411Ophthalmoscope

Welch Allyn, Inc. · NSN 6540-01-263-7740 · FSC 6540 · No Item Name Available
Verified by PartsTable
NSN 6540-01-263-7740 — this item is cataloged by the U.S. Government under National Stock Number 6540-01-263-7740. Primary manufacturer part number: 11411.
Features
  • Ophthalmoscope — FSC 6540
  • Accessory Components and Quantity: HALOGEN LAMP,2.5 V,1; MIRROR OPTICAL SYSTEM,1; APERATURE SELECTION,5; RUBBER BROW REST,1 V
  • Lens Zero Aperture: INCLUDED
  • Cord Handle: NOT PROVIDED
  • Design Designation: HALOGEN
  • Carrying Case: NOT PROVIDED
  • Lens Positive Diopter Power Range: +0.00 TO 40.00
  • Lens Negative Diopter Power Range: -25.00 TO 0.00
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Ophthalmoscope, cataloged under National Stock Number 6540-01-263-7740, is classified within Federal Supply Class 6540 (No Item Name Available) of the Medical, Dental, and Veterinary Equipment group. The primary manufacturer of record is Welch Allyn, Inc.. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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
NSN6540-01-263-7740
Primary Part Number11411
Item NameOphthalmoscope
FSC / FSG6540 / 65 — No Item Name Available
ManufacturerWelch Allyn, Inc.
StatusACTIVE
Accessory Components and QuantityHALOGEN LAMP,2.5 V,1; MIRROR OPTICAL SYSTEM,1; APERATURE SELECTION,5; RUBBER BROW REST,1 V
Lens Zero ApertureINCLUDED
Cord HandleNOT PROVIDED
Design DesignationHALOGEN
Carrying CaseNOT PROVIDED
Lens Positive Diopter Power Range+0.00 TO 40.00
Lens Negative Diopter Power Range-25.00 TO 0.00
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor6130-01-648-4021 (827950-22)
HAZMATNo
Verified Substitutes 12
6130-01-648-4021827950-22 SUCCESSOR
Charger,battery
Naval Sea Systems Command
5340-01-667-26831141-1 SUCCESSOR
Bracket,angle
Tru-Hitch, Inc.
6240-00-183-0570202755-01 INTERCHANGEABLE
Lamp,incandescent
Drs C3 & Aviation Company Dba Drs Data & Imaging Systems
5133-00-189-9273 INTERCHANGEABLE
Drill,twist
4320-00-367-144311411 INTERCHANGEABLE
Chamber,diaphragm
Leslie Controls, Inc. Dba Leslie Controls Inc
1660-00-485-5894 INTERCHANGEABLE
Guide-Spring---Appl
5950-00-647-9938 INTERCHANGEABLE
Coil,radio Frequency
5935-00-892-9114 INTERCHANGEABLE
Connector,receptacle,electrical
3040-01-104-046611-411 INTERCHANGEABLE
Camshaft Assembly
Thermo King Corporation Dba Phoenix Global Distirbution.
5365-01-119-3989 INTERCHANGEABLE
Spacer,plate
Cross-Reference Index
Part NumberManufacturer
11411 PRIMARY Welch Allyn, Inc. (USA)
11411 Welch Allyn Holdings, Inc. (USA)
Related Parts
SUCCESSOR 6130-01-648-4021 Charger,battery · 827950-22
5340-01-667-2683SUCCESSOR
BRACKET,ANGLE
1141-1
6240-00-183-0570INTERCHANGEABLE
LAMP,INCANDESCENT
202755-01
5133-00-189-9273INTERCHANGEABLE
DRILL,TWIST
4320-00-367-1443INTERCHANGEABLE
CHAMBER,DIAPHRAGM
11411
1660-00-485-5894INTERCHANGEABLE
GUIDE-SPRING---APPL
5950-00-647-9938INTERCHANGEABLE
COIL,RADIO FREQUENCY
5935-00-892-9114INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
3040-01-104-0466INTERCHANGEABLE
CAMSHAFT ASSEMBLY
11-411
5365-01-119-3989INTERCHANGEABLE
SPACER,PLATE
3020-01-221-2152INTERCHANGEABLE
GEAR,SPUR
11411
5999-01-299-4379INTERCHANGEABLE
CONTACT,ELECTRICAL
114-11

Frequently Asked Questions

What is NSN 6540-01-263-7740?

NSN 6540-01-263-7740 is a Ophthalmoscope, manufactured by Welch Allyn, Inc., classified under FSC 6540 (No Item Name Available). Status: active.

What are the part numbers for NSN 6540-01-263-7740?

NSN 6540-01-263-7740 has 2 cross-referenced part numbers: 11411 (Welch Allyn, Inc.), 11411 (Welch Allyn Holdings, Inc.).

What NSN replaces 6540-01-263-7740?

There are 12 known substitutes for 6540-01-263-7740: 6130-01-648-4021, 5340-01-667-2683, 6240-00-183-0570 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 11411?

Key specifications for 11411: Accessory Components and Quantity: HALOGEN LAMP,2.5 V,1; MIRROR OPTICAL SYSTEM,1; APERATURE SELECTION,5; RUBBER BROW REST,1 V; Lens Zero Aperture: INCLUDED; Cord Handle: NOT PROVIDED; Design Designation: HALOGEN. 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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