PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

23820Head,otoscope Operating

Welch Allyn, Inc. · NSN 6515-01-590-4974 · FSC 6515 · No Item Name Available
Verified by PartsTable
NSN 6515-01-590-4974 — this item is cataloged by the U.S. Government under National Stock Number 6515-01-590-4974. Primary manufacturer part number: 23820.
Features
  • Head,otoscope Operating — FSC 6515
  • 6 verified cross-references
  • Primary manufacturer: Welch Allyn, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Head,otoscope Operating, cataloged under National Stock Number 6515-01-590-4974, is classified within Federal Supply Class 6515 (No Item Name Available) of the Medical, Dental, and Veterinary Equipment group. The primary manufacturer of record is Welch Allyn, Inc.. This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6515-01-590-4974
Primary Part Number23820
Item NameHead,otoscope Operating
FSC / FSG6515 / 65 — No Item Name Available
ManufacturerWelch Allyn, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 12
5999-00-035-792523-820 INTERCHANGEABLE
Contact,electrical
Eaton Corp Opns & Technical Center
4730-00-114-0911ASC25-D INTERCHANGEABLE
Clamp,hose
Curtis Dyna-Fog, Ltd.
5940-00-150-42392382-0 INTERCHANGEABLE
Post,binding,electrical
Fluke Electronics Corp
5955-00-179-8114 INTERCHANGEABLE
Oscillator,noncrystal Controlled
5330-00-306-199523820 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
5307-00-332-939120430 INTERCHANGEABLE
Stud,welding
Northrop Grumman Systems Corporation Div Marine Systems
5930-00-386-852023820 INTERCHANGEABLE
Switch Section,rotary
Cts Corp Electromechanical Div
6685-00-537-2490 INTERCHANGEABLE
Gage,pressure,dial Indicating
5310-00-596-665020430 INTERCHANGEABLE
Washer,recessed
Pratt & Whitney Canada Corp Div Pratt & Whitney Canada Corp.
5962-01-015-8531LM120H-5.0/883B INTERCHANGEABLE
Microcircuit,linear
National Semiconductor Corporation
Cross-Reference Index
Part NumberManufacturer
DIAG OTOSCOPE WITH THROAT ILLU Welch Allyn, Inc. (USA)
23820 Welch Allyn Holdings, Inc. (USA)
DIAG OTOSCOPE WITH THROAT ILLU Welch Allyn Holdings, Inc. (USA)
23820 PRIMARY Welch Allyn, Inc. (USA)
6515NCM105717 Defense Medical Standardization Board (USA)
20430 Defense Logistics Agency Directorate of Medical Materiel Defense Supply Center Philadelphia (USA)
Related Parts
5999-00-035-7925INTERCHANGEABLE
CONTACT,ELECTRICAL
23-820
4730-00-114-0911INTERCHANGEABLE
CLAMP,HOSE
ASC25-D
5940-00-150-4239INTERCHANGEABLE
POST,BINDING,ELECTRICAL
2382-0
5955-00-179-8114INTERCHANGEABLE
OSCILLATOR,NONCRYSTAL CONTROLLED
5330-00-306-1995INTERCHANGEABLE
SEAL,PLAIN ENCASED
23820
5307-00-332-9391INTERCHANGEABLE
STUD,WELDING
20430
5930-00-386-8520INTERCHANGEABLE
SWITCH SECTION,ROTARY
23820
6685-00-537-2490INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
5310-00-596-6650INTERCHANGEABLE
WASHER,RECESSED
20430
5962-01-015-8531INTERCHANGEABLE
MICROCIRCUIT,LINEAR
LM120H-5.0/883B
4940-01-037-8018INTERCHANGEABLE
GUN,AIR BLOW
3040-01-230-8988INTERCHANGEABLE
SHAFT,SHOULDERED
23820

Frequently Asked Questions

What is NSN 6515-01-590-4974?

NSN 6515-01-590-4974 is a Head,otoscope Operating, manufactured by Welch Allyn, Inc., classified under FSC 6515 (No Item Name Available). Status: active.

What are the part numbers for NSN 6515-01-590-4974?

NSN 6515-01-590-4974 has 6 cross-referenced part numbers: DIAG OTOSCOPE WITH THROAT ILLU (Welch Allyn, Inc.), 23820 (Welch Allyn Holdings, Inc.), DIAG OTOSCOPE WITH THROAT ILLU (Welch Allyn Holdings, Inc.), 23820 (Welch Allyn, Inc.), 6515NCM105717 (Defense Medical Standardization Board) and 1 more.

What NSN replaces 6515-01-590-4974?

There are 12 known substitutes for 6515-01-590-4974: 5999-00-035-7925, 4730-00-114-0911, 5940-00-150-4239 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 23820?

Key specifications for 23820: Part Name Assigned by Controlling Agency: OTOSCOPE MACROVIEW WITH THROAT ILLUMINATOR; End Item Identification: 6515-01-564-8377 OTOSCOPE AND OPHTHALMOSCOPE SET; Special Features: DIAGNOSTIC OTOSCOPE WITH THROAT ILLUMINATOR; ADVANCED OPTICS FOR INCREASED MAGNIFICATION; PROVIDES NEARLY FULL VIEW OF TYMPANIC MEMBRANE; VIRTUALLY ELIMINATES NEED FOR PANNING; SIMPLIFIES SEEING PAST WAX AND LOCATING FLUID BEHIND THE EARDRUM; FOR USE WITH ITEM PANOPTIC OPHTHALMOSCOPE AND OTOSCOPE SET NSN 6515-01-564-8377. 3 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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