PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2500-000-18F-NMThermometer,self-Indicating

Koehler Instrument Company, Inc. · NSN 6685-00-242-2203 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-242-2203 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-242-2203. Primary manufacturer part number: 2500-000-18F-NM.
Features
  • Thermometer,self-Indicating — FSC 6685
  • Scale Measurement Range: +94.000 TO 180.000 DEG FAHRENHEIT
  • Scale Type: ETCHED STEM
  • Securing Device Type: RING
  • Scale Smallest Increment: 0.2 DEG FAHRENHEIT
  • Features Provided: EXPANSION CHAMBER
  • Design Type: FLUCTUATING
  • Actuating Medium: MERCURY
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Thermometer,self-Indicating, cataloged under National Stock Number 6685-00-242-2203, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Koehler Instrument Company, Inc.. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 10 commercial cross-references from 9 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6685-00-242-2203
Primary Part Number2500-000-18F-NM
Item NameThermometer,self-Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerKoehler Instrument Company, Inc.
StatusCANCELLED
Scale Measurement Range+94.000 TO 180.000 DEG FAHRENHEIT
Scale TypeETCHED STEM
Securing Device TypeRING
Scale Smallest Increment0.2 DEG FAHRENHEIT
Features ProvidedEXPANSION CHAMBER
Design TypeFLUCTUATING
Actuating MediumMERCURY
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
6685-00-242-2202ASTM 17F INTERCHANGEABLE
Thermometer,self-Indicating
American Society for Testing and Materials Dba Astm International
6685-00-242-2204 INTERCHANGEABLE
Thermometer,self-Indicating
6685-00-242-2205ASTM 22F INTERCHANGEABLE
Thermometer,self-Indicating
American Society for Testing and Materials Dba Astm International
1650-00-786-709555444 INTERCHANGEABLE
Plate,wear
Parker Hannifin Corporation Div Hydraulic Systems Division
5133-00-839-549631775 INTERCHANGEABLE
Drill,twist
New York Twist Drill Inc
5340-01-534-136655444 INTERCHANGEABLE
Cover,access
Aerovironment, Inc. Dba Aerovironment Inc
1080-01-541-55222KP736 INTERCHANGEABLE
Cover,camouflage Screening
Oshkosh Defense Llc
Cross-Reference Index
Part NumberManufacturer
2500-000-18F-NM PRIMARY Koehler Instrument Company, Inc. (USA)
21744G Tycos Instruments Inc a Welch Allyn Co (USA)
13-575H Fisher Scientific Company L.l.c. (USA)
55444Y Liftec Inc Div Liftec, Inc. (USA)
80-118-18 Manostat Corp (USA)
S80765 Sargent-Welch Scientific Co (USA)
27868-2 Central Scientific Co Educational (USA)
55444 Liftec Inc Div Liftec, Inc. (USA)
EP-67-18F62 American Society for Testing and Materials Dba Astm International (USA)
456F2 Ashcroft Inc Dba Heise (USA)
Related Parts
6685-00-242-2202INTERCHANGEABLE
THERMOMETER,SELF-INDICATING
ASTM 17F
6685-00-242-2204INTERCHANGEABLE
THERMOMETER,SELF-INDICATING
6685-00-242-2205INTERCHANGEABLE
THERMOMETER,SELF-INDICATING
ASTM 22F
1650-00-786-7095INTERCHANGEABLE
PLATE,WEAR
55444
5133-00-839-5496INTERCHANGEABLE
DRILL,TWIST
31775
5340-01-534-1366INTERCHANGEABLE
COVER,ACCESS
55444
1080-01-541-5522INTERCHANGEABLE
COVER,CAMOUFLAGE SCREENING
2KP736

Frequently Asked Questions

What is NSN 6685-00-242-2203?

NSN 6685-00-242-2203 is a Thermometer,self-Indicating, manufactured by Koehler Instrument Company, Inc., classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-00-242-2203?

NSN 6685-00-242-2203 has 10 cross-referenced part numbers: 2500-000-18F-NM (Koehler Instrument Company, Inc.), 21744G (Tycos Instruments Inc a Welch Allyn Co), 13-575H (Fisher Scientific Company L.l.c.), 55444Y (Liftec Inc Div Liftec, Inc.), 80-118-18 (Manostat Corp) and 5 more.

What NSN replaces 6685-00-242-2203?

There are 7 known substitutes for 6685-00-242-2203: 6685-00-242-2202, 6685-00-242-2204, 6685-00-242-2205 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2500-000-18F-NM?

Key specifications for 2500-000-18F-NM: Overall Length: 275.0 MILLIMETERS NOMINAL MM; Scale Measurement Range: +94.000 TO 180.000 DEG FAHRENHEIT; Scale Type: ETCHED STEM; Securing Device Type: RING. 8 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-242-2203 still in active supply?

NSN 6685-00-242-2203 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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