PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21111Head,otoscope Operating

Welch Allyn, Inc. · NSN 6515-01-520-5725 · FSC 6515 · No Item Name Available
Verified by PartsTable
NSN 6515-01-520-5725 — this item is cataloged by the U.S. Government under National Stock Number 6515-01-520-5725. Primary manufacturer part number: 21111.
Features
  • Head,otoscope Operating — FSC 6515
  • Design Designation: WELCH-ALLYN
  • Specific Use: EAR
  • 4 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 6515-01-520-5725, 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.. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6515-01-520-5725
Primary Part Number21111
Item NameHead,otoscope Operating
FSC / FSG6515 / 65 — No Item Name Available
ManufacturerWelch Allyn, Inc.
StatusACTIVE
Design DesignationWELCH-ALLYN
Specific UseEAR
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 9
6210-00-110-540726011 INTERCHANGEABLE
Control,electric Light
Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems
5355-00-255-049621-1-11 INTERCHANGEABLE
Dial,control
Vishay Sprague Inc
5315-00-448-9815040354 INTERCHANGEABLE
Pin,straight,headless
Woodward, Inc.
5950-00-681-9446211-11 INTERCHANGEABLE
Coil,radio Frequency
Wilco Corp
3750-00-892-2967211-210 INTERCHANGEABLE
Ball
Cnh Industrial America Llc Dba Cnh America
5315-01-148-103921111 INTERCHANGEABLE
Pin
Hyster-Yale Group, Inc.
7530-01-366-636021111 INTERCHANGEABLE
Book,appointment
Franklin Covey Co Government Group Products
4820-01-545-548921111-001 INTERCHANGEABLE
Valve,linear,directional Control
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4210-01-546-9385 INTERCHANGEABLE
Extinguisher,fire
Cross-Reference Index
Part NumberManufacturer
21111 Welch Allyn Holdings, Inc. (USA)
6515NCM040193 Defense Medical Standardization Board (USA)
04-0354 Defense Logistics Agency Directorate of Medical Materiel Defense Supply Center Philadelphia (USA)
21111 PRIMARY Welch Allyn, Inc. (USA)
Related Parts
6210-00-110-5407INTERCHANGEABLE
CONTROL,ELECTRIC LIGHT
26011
5355-00-255-0496INTERCHANGEABLE
DIAL,CONTROL
21-1-11
5315-00-448-9815INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
040354
5950-00-681-9446INTERCHANGEABLE
COIL,RADIO FREQUENCY
211-11
3750-00-892-2967INTERCHANGEABLE
BALL
211-210
5315-01-148-1039INTERCHANGEABLE
PIN
21111
7530-01-366-6360INTERCHANGEABLE
BOOK,APPOINTMENT
21111
4820-01-545-5489INTERCHANGEABLE
VALVE,LINEAR,DIRECTIONAL CONTROL
21111-001
4210-01-546-9385INTERCHANGEABLE
EXTINGUISHER,FIRE

Frequently Asked Questions

What is NSN 6515-01-520-5725?

NSN 6515-01-520-5725 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 6515-01-520-5725?

NSN 6515-01-520-5725 has 4 cross-referenced part numbers: 21111 (Welch Allyn Holdings, Inc.), 6515NCM040193 (Defense Medical Standardization Board), 04-0354 (Defense Logistics Agency Directorate of Medical Materiel Defense Supply Center Philadelphia), 21111 (Welch Allyn, Inc.).

What NSN replaces 6515-01-520-5725?

There are 9 known substitutes for 6515-01-520-5725: 6210-00-110-5407, 5355-00-255-0496, 5315-00-448-9815 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21111?

Key specifications for 21111: End Item Identification: OTOSCOPE AND OPHTHALMOSCOPE,NSN: 6515-01-333-3165; Part Name Assigned by Controlling Agency: HEAD OTOSCOPE DIAGNOSTIC POCKETSCOPE; Design Designation: WELCH-ALLYN; Special Features: HEAD OTOSCOPE DIAGNOSTIC HPX 2.5V, 9.8 DIOPTER; 4 INCH FOCAL LENGTH; POCKETSCOPE; SMALL, CONVENIENT AND EASY TO USE WITH BRIGHT WHITE HALOGEN LIGHT AND A BUILT-IN THROAT ILLUMINATOR; FIBER OPTICS; WIDE ANGLE VIEWING LENS; THIS IS THE HEAD-ONLY V. 5 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com