PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet
MRO / Instruments and Laboratory Equipment / 6685-00-731-5958

10440MRThermometer,self-Indicating

Winters Instruments · NSN 6685-00-731-5958 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-731-5958 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-731-5958. Primary manufacturer part number: 10440MR.
MRO FSG 66 NO ITEM NAME AVAILABLE Technical Drawing
6685-00-731-5958 — No Item Name Available illustration
Features
  • Thermometer,self-Indicating — FSC 6685
  • Armor Encased Tip Type: PERFORATED
  • Actuating Medium: MERCURY
  • Securing Device Type: RING
  • Immersion Length: 3.000 INCHES NOMINAL IN
  • Scale Smallest Increment: 1.0 DEG FAHRENHEIT
  • Scale Inscription/background Color: BLACK MARKING ON WHITE BACKGROUND
  • Design Type: FLUCTUATING
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Thermometer,self-Indicating, cataloged under National Stock Number 6685-00-731-5958, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Winters Instruments. Government technical data includes 8 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. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-731-5958
Primary Part Number10440MR
Item NameThermometer,self-Indicating
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerWinters Instruments
StatusACTIVE
Armor Encased Tip TypePERFORATED
Actuating MediumMERCURY
Securing Device TypeRING
Immersion Length3.000 INCHES NOMINAL IN
Scale Smallest Increment1.0 DEG FAHRENHEIT
Scale Inscription/background ColorBLACK MARKING ON WHITE BACKGROUND
Design TypeFLUCTUATING
Scale TypeETCHED STEM
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
⇄ Verified Substitutes 11
5965-00-280-3111SC-C-105391 INTERCHANGEABLE
Cushion,ear
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
5935-01-058-64885082-2240-00 INTERCHANGEABLE
Adapter,connector
Tyco Electronics Corp
4235-01-391-204721270 INTERCHANGEABLE
Sorbent,hazardous Material
A.r.k. Enterprises, Inc., the
1005-01-465-040112951011 INTERCHANGEABLE
Handle,gun Carrying
Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate
4820-01-503-249721270-001 INTERCHANGEABLE
Valve Assembly,manifold
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-503-261009-21243-1-1 INTERCHANGEABLE
Valve,check
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-503-261821270-1003-1 INTERCHANGEABLE
Seat,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-503-262121270-1004-1 INTERCHANGEABLE
Retainer,quiet Element
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-503-262321270-1000-1 INTERCHANGEABLE
Disk,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
4820-01-503-686221270-801-1 INTERCHANGEABLE
Regulating Element,flow,valve
Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace
Cross-Reference Index
Part NumberManufacturer
21270 Tycos Instruments Inc a Welch Allyn Co (USA)
10440MR PRIMARY Winters Instruments (CAN)
Related Parts
5965-00-280-3111INTERCHANGEABLE
CUSHION,EAR
SC-C-105391
5935-01-058-6488INTERCHANGEABLE
ADAPTER,CONNECTOR
5082-2240-00
4235-01-391-2047INTERCHANGEABLE
SORBENT,HAZARDOUS MATERIAL
21270
1005-01-465-0401INTERCHANGEABLE
HANDLE,GUN CARRYING
12951011
4820-01-503-2497INTERCHANGEABLE
VALVE ASSEMBLY,MANIFOLD
21270-001
4820-01-503-2610INTERCHANGEABLE
VALVE,CHECK
09-21243-1-1
4820-01-503-2618INTERCHANGEABLE
SEAT,VALVE
21270-1003-1
4820-01-503-2621INTERCHANGEABLE
RETAINER,QUIET ELEMENT
21270-1004-1
4820-01-503-2623INTERCHANGEABLE
DISK,VALVE
21270-1000-1
4820-01-503-6862INTERCHANGEABLE
REGULATING ELEMENT,FLOW,VALVE
21270-801-1
5950-01-529-6526INTERCHANGEABLE
TRANSFORMER,POWER
21270

Frequently Asked Questions

What is NSN 6685-00-731-5958?

NSN 6685-00-731-5958 is a Thermometer,self-Indicating, manufactured by Winters Instruments, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-731-5958?

NSN 6685-00-731-5958 has 2 cross-referenced part numbers: 21270 (Tycos Instruments Inc a Welch Allyn Co), 10440MR (Winters Instruments).

What NSN replaces 6685-00-731-5958?

There are 11 known substitutes for 6685-00-731-5958: 5965-00-280-3111, 5935-01-058-6488, 4235-01-391-2047 and 8 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 10440MR?

Key specifications for 10440MR: Armor Encased Tip Type: PERFORATED; Actuating Medium: MERCURY; Securing Device Type: RING; Immersion Length: 3.000 INCHES NOMINAL IN. 9 total characteristics are documented in the Federal Logistics Information System.

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