PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AU2525RThermometer,indicating,capillary

Ametek, Inc. Div Aerospace & Defense · NSN 6685-00-737-3826 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-737-3826 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-737-3826. Primary manufacturer part number: AU2525R.
Features
  • Thermometer,indicating,capillary — FSC 6685
  • Mounting Thread Quantity: 32 PER INCH
  • Mounting Facility Type and Quantity: 1 BRACKET(S) AND 2 THREADED STUD(S)
  • Dial Diameter: 2.000 INCHES NOMINAL IN
  • Active Portion Length: 3.000 INCHES NOMINAL IN
  • Indicator Connection Method: FLEXIBLE TUBE
  • Case Diameter: 2.312 INCHES NOMINAL IN
  • Mounting Facility Nominal Screw Thread Diameter: 0.190 INCHES IN
Applications
  • Applications requiring Copper Bulb construction
General Description

The Thermometer,indicating,capillary, cataloged under National Stock Number 6685-00-737-3826, 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 23 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-00-737-3826
Primary Part NumberAU2525R
Item NameThermometer,indicating,capillary
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerAmetek, Inc. Div Aerospace & Defense
StatusACTIVE
Mounting Thread Quantity32 PER INCH
Mounting Facility Type and Quantity1 BRACKET(S) AND 2 THREADED STUD(S)
Dial Diameter2.000 INCHES NOMINAL IN
Active Portion Length3.000 INCHES NOMINAL IN
Indicator Connection MethodFLEXIBLE TUBE
Case Diameter2.312 INCHES NOMINAL IN
Mounting Facility Nominal Screw Thread Diameter0.190 INCHES IN
MaterialCOPPER BULB
MaterialSTEEL METER CASE
Bulb Overall Length3.500 INCHES NOMINAL IN
Flexible Tube Length120.000 INCHES NOMINAL IN
Case TypeVAPORPROOF
Scale Smallest Increment25.0 DEG FAHRENHEIT
Bulb Quantity1
Bulb TypePLAIN RIGID
Scale Inscription/background ColorWHITE MARKING ON BLACK BACKGROUND
Mounting Facility Screw Thread Series DesignatorUNF
Bulb Connection TypeUNION
Actuating MediumETHYL ETHER
Scale TypeCONCENTRIC DIAL
Scale Measurement Range+100.000 TO 320.000 DEG FAHRENHEIT
Pointer/pen Type and Quantity1 INDICATING SINGLE
Active Portion Diameter0.440 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6640-00-507-5517G25 INTERCHANGEABLE
Shaking Machine,laboratory
New Brunswick Tool and Die Co
5950-00-591-9769G25 INTERCHANGEABLE
Transformer,audio Frequency
Magnetek Inc Lighting Products Group
5330-00-640-8535 INTERCHANGEABLE
Ring,wiper
5330-00-651-8865G25 INTERCHANGEABLE
Packing,glass Gage
Clark-Reliance Llc Dba Jerguson Gage & Valve
4930-01-103-8209G25 INTERCHANGEABLE
Adapter,grease Gun Coupling
Weems Industries, Inc. Dba Weems Industries Inc
2590-01-129-51705356793 INTERCHANGEABLE
Cap,filler Opening
Am General Llc
4520-01-131-2941 INTERCHANGEABLE
Heating Element,electrical,nonim
6665-01-282-9954TE-5025 INTERCHANGEABLE
Calibration Kit
General Metal Works Inc Sub of Andersen Samplers Inc
6210-01-348-3133VPGL2-GRPL INTERCHANGEABLE
Globe,electric Light
Egs Electrical Group Appleton Div
6140-01-356-5925G-25 INTERCHANGEABLE
Battery,storage
Teledyne Technologies Incorporated Dba Teledyne Battery Products Div Teledyne Battery Products
Cross-Reference Index
Part NumberManufacturer
AU2525R PRIMARY Ametek, Inc. Div Aerospace & Defense (USA)
G25 Paccar Government Group Co Yarrow Bay Office Pk (USA)
Related Parts
6640-00-507-5517INTERCHANGEABLE
SHAKING MACHINE,LABORATORY
G25
5950-00-591-9769INTERCHANGEABLE
TRANSFORMER,AUDIO FREQUENCY
G25
5330-00-640-8535INTERCHANGEABLE
RING,WIPER
5330-00-651-8865INTERCHANGEABLE
PACKING,GLASS GAGE
G25
4930-01-103-8209INTERCHANGEABLE
ADAPTER,GREASE GUN COUPLING
G25
2590-01-129-5170INTERCHANGEABLE
CAP,FILLER OPENING
5356793
4520-01-131-2941INTERCHANGEABLE
HEATING ELEMENT,ELECTRICAL,NONIM
6665-01-282-9954INTERCHANGEABLE
CALIBRATION KIT
TE-5025
6210-01-348-3133INTERCHANGEABLE
GLOBE,ELECTRIC LIGHT
VPGL2-GRPL
6140-01-356-5925INTERCHANGEABLE
BATTERY,STORAGE
G-25
5325-01-385-0639INTERCHANGEABLE
INSERT,PANEL FASTENER
G25
6620-01-449-2730INTERCHANGEABLE
GAGE,PRESSURE,DIAL INDICATING
G2.5-300

Frequently Asked Questions

What is NSN 6685-00-737-3826?

NSN 6685-00-737-3826 is a Thermometer,indicating,capillary, manufactured by Ametek, Inc. Div Aerospace & Defense, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-00-737-3826?

NSN 6685-00-737-3826 has 2 cross-referenced part numbers: AU2525R (Ametek, Inc. Div Aerospace & Defense), G25 (Paccar Government Group Co Yarrow Bay Office Pk).

What NSN replaces 6685-00-737-3826?

There are 12 known substitutes for 6685-00-737-3826: 6640-00-507-5517, 5950-00-591-9769, 5330-00-640-8535 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of AU2525R?

Key specifications for AU2525R: Mounting Thread Quantity: 32 PER INCH; Mounting Facility Type and Quantity: 1 BRACKET(S) AND 2 THREADED STUD(S); Dial Diameter: 2.000 INCHES NOMINAL IN; Active Portion Length: 3.000 INCHES NOMINAL IN. 24 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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