PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C243Thermometer,self-Indicating

Ametek, Inc. Div Aerospace & Defense · NSN 6685-00-983-9408 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-983-9408 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-983-9408. Primary manufacturer part number: C243.
Features
  • Thermometer,self-Indicating — FSC 6685
  • Scale Smallest Increment: 2.0 DEG CELSIUS
  • Scale Type: ETCHED STEM
  • Scale Inscription/background Color: BLACK MARKING ON SILVER BACKGROUND
  • Actuating Medium: MERCURY
  • Design Type: FLUCTUATING
  • 2 verified cross-references
  • Primary manufacturer: Ametek, Inc. Div Aerospace & Defense
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Thermometer,self-Indicating, cataloged under National Stock Number 6685-00-983-9408, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Ametek, Inc. Div Aerospace & Defense. Government technical data includes 5 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. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-983-9408
Primary Part NumberC243
Item NameThermometer,self-Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerAmetek, Inc. Div Aerospace & Defense
StatusACTIVE
Scale Smallest Increment2.0 DEG CELSIUS
Scale TypeETCHED STEM
Scale Inscription/background ColorBLACK MARKING ON SILVER BACKGROUND
Actuating MediumMERCURY
Design TypeFLUCTUATING
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5975-00-636-0064C24-3 INTERCHANGEABLE
Conduit,metal,flexible
Page Chester Ltd Dba Cooperative Industries Div Cooperative Industries Aerospace Defense
6105-01-218-9236 INTERCHANGEABLE
Motor,alternating Current
6140-01-337-0210624MF INTERCHANGEABLE
Battery,storage
Electro Battery Mfg Co
5360-01-388-5783C243 INTERCHANGEABLE
Spring,helical,extension
Matthew Warren, Inc. Dba Century Spring Corp. Div Century Spring Corp.
Cross-Reference Index
Part NumberManufacturer
C243 PRIMARY Ametek, Inc. Div Aerospace & Defense (USA)
2351190 Lockheed Martin Corporation Div Rms - Mitchel Field (USA)
Related Parts
5975-00-636-0064INTERCHANGEABLE
CONDUIT,METAL,FLEXIBLE
C24-3
6105-01-218-9236INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
6140-01-337-0210INTERCHANGEABLE
BATTERY,STORAGE
624MF
5360-01-388-5783INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
C243

Frequently Asked Questions

What is NSN 6685-00-983-9408?

NSN 6685-00-983-9408 is a Thermometer,self-Indicating, manufactured by Ametek, Inc. Div Aerospace & Defense, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-983-9408?

NSN 6685-00-983-9408 has 2 cross-referenced part numbers: C243 (Ametek, Inc. Div Aerospace & Defense), 2351190 (Lockheed Martin Corporation Div Rms - Mitchel Field).

What NSN replaces 6685-00-983-9408?

There are 4 known substitutes for 6685-00-983-9408: 5975-00-636-0064, 6105-01-218-9236, 6140-01-337-0210 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of C243?

Key specifications for C243: Scale Smallest Increment: 2.0 DEG CELSIUS; Scale Type: ETCHED STEM; Scale Inscription/background Color: BLACK MARKING ON SILVER BACKGROUND; Overall Length: 18.000 INCHES NOMINAL IN. 6 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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