PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18320Retinoscope

Welch Allyn, Inc. · NSN 6540-01-443-5366 · FSC 6540 · No Item Name Available
Verified by PartsTable
NSN 6540-01-443-5366 — this item is cataloged by the U.S. Government under National Stock Number 6540-01-443-5366. Primary manufacturer part number: 18320.
Features
  • Retinoscope — FSC 6540
  • 3 verified cross-references
  • Primary manufacturer: Welch Allyn, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Retinoscope, cataloged under National Stock Number 6540-01-443-5366, 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.. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6540-01-443-5366
Primary Part Number18320
Item NameRetinoscope
FSC / FSG6540 / 65 — No Item Name Available
ManufacturerWelch Allyn, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor5340-01-256-0501 (18320)
HAZMATNo
Verified Substitutes 10
5340-01-256-050118320 SUCCESSOR
Cap,protective,dust and Moisture
Templeton Kenly and Co Inc
5950-00-086-8785 INTERCHANGEABLE
Coil,radio Frequency
5935-00-244-9660AC1499 INTERCHANGEABLE
Connector,plug,electrical
Times Microwave Systems, Inc Dba Times Microwave Systems Inc Div Times Microwave Systems
5133-00-838-5300 INTERCHANGEABLE
Drill,twist
5950-00-998-4256546739 INTERCHANGEABLE
Reactor
Cae Usa Inc.
7125-01-006-755219-320 INTERCHANGEABLE
Cabinet,small Parts,storage
Akro-Mils
5962-01-076-7969932821-43 INTERCHANGEABLE
Microcircuit,memory
Raytheon Company Dba Raytheon
5950-01-104-8517 INTERCHANGEABLE
Reactor
4310-01-394-4816 INTERCHANGEABLE
Ring,piston
5905-01-396-75740183200004 INTERCHANGEABLE
Resistor,fixed,film
Riimic, Llc Dba Sunair Electronics
Cross-Reference Index
Part NumberManufacturer
18320 Welch Allyn (uk) Ltd (GBR)
18320 PRIMARY Welch Allyn, Inc. (USA)
18320 Welch Allyn Holdings, Inc. (USA)
Related Parts
SUCCESSOR 5340-01-256-0501 Cap,protective,dust and Moisture · 18320
5950-00-086-8785INTERCHANGEABLE
COIL,RADIO FREQUENCY
5935-00-244-9660INTERCHANGEABLE
CONNECTOR,PLUG,ELECTRICAL
AC1499
5133-00-838-5300INTERCHANGEABLE
DRILL,TWIST
5950-00-998-4256INTERCHANGEABLE
REACTOR
546739
7125-01-006-7552INTERCHANGEABLE
CABINET,SMALL PARTS,STORAGE
19-320
5962-01-076-7969INTERCHANGEABLE
MICROCIRCUIT,MEMORY
932821-43
5950-01-104-8517INTERCHANGEABLE
REACTOR
4310-01-394-4816INTERCHANGEABLE
RING,PISTON
5905-01-396-7574INTERCHANGEABLE
RESISTOR,FIXED,FILM
0183200004

Frequently Asked Questions

What is NSN 6540-01-443-5366?

NSN 6540-01-443-5366 is a Retinoscope, manufactured by Welch Allyn, Inc., classified under FSC 6540 (No Item Name Available). Status: active.

What are the part numbers for NSN 6540-01-443-5366?

NSN 6540-01-443-5366 has 3 cross-referenced part numbers: 18320 (Welch Allyn (uk) Ltd), 18320 (Welch Allyn, Inc.), 18320 (Welch Allyn Holdings, Inc.).

What NSN replaces 6540-01-443-5366?

There are 10 known substitutes for 6540-01-443-5366: 5340-01-256-0501, 5950-00-086-8785, 5935-00-244-9660 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18320?

Key specifications for 18320: Special Features: SUPPLIED WITH COAX OPHTHALMOSCOP. 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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