PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

990C347Thermometer,indicating,capillary

Northrop Grumman Systems Corporation Dba Electronic Systems · NSN 6685-00-261-9858 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-00-261-9858 — this item is cataloged by the U.S. Government under National Stock Number 6685-00-261-9858. Primary manufacturer part number: 990C347.
Features
  • Thermometer,indicating,capillary — FSC 6685
  • Scale Type: CONCENTRIC DIAL
  • Case Type: CORROSION RESISTANT
  • Scale Smallest Increment: 2.0 DEG FAHRENHEIT
  • Material: BRASS BULB
  • Material: STEEL METER CASE
  • Style Designator: BULB W/O SOCKET
  • Actuating Medium: VAPOR TENSION
Applications
  • Applications requiring Brass Bulb construction
General Description

The Thermometer,indicating,capillary, cataloged under National Stock Number 6685-00-261-9858, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Northrop Grumman Systems Corporation Dba Electronic Systems. Government technical data includes 21 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. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6685-00-261-9858
Primary Part Number990C347
Item NameThermometer,indicating,capillary
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation Dba Electronic Systems
StatusCANCELLED
Scale TypeCONCENTRIC DIAL
Case TypeCORROSION RESISTANT
Scale Smallest Increment2.0 DEG FAHRENHEIT
MaterialBRASS BULB
MaterialSTEEL METER CASE
Style DesignatorBULB W/O SOCKET
Actuating MediumVAPOR TENSION
Active Portion Diameter0.440 INCHES NOMINAL IN
Active Portion Length3.500 INCHES NOMINAL IN
Scale Measurement Range+20.000 TO 240.000 DEG FAHRENHEIT
Pointer/pen Type and Quantity1 INDICATING SINGLE
Bulb TypePLAIN RIGID
Indicator Connection MethodFLEXIBLE TUBE
Bulb StylePLAIN BULB W/BENDABLE EXTENSION
Flexible Tube Length72.000 INCHES NOMINAL IN
Bulb Quantity1
Bulb Connection TypeUNION
Case Diameter2.912 INCHES NOMINAL IN
Scale Inscription/background ColorBLACK MARKING ON WHITE BACKGROUND
Dial Diameter2.500 INCHES NOMINAL IN
Bulb Tip Length3.500 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
6685-00-006-7915K25140 INTERCHANGEABLE
Thermometer,indicating,capillary
Tempco Inc Dba Marshalltown Tempco
5340-00-467-3734U400 INTERCHANGEABLE
Clamp,loop
Clamps Inc
6685-00-832-8767 INTERCHANGEABLE
Thermometer,indicating,capillary
6685-00-894-3188 INTERCHANGEABLE
Thermometer,indicating,capillary
6685-00-900-3723 INTERCHANGEABLE
Thermometer,indicating,capillary
6685-01-037-1132990C347H01 INTERCHANGEABLE
Thermometer,indicating,capillary
Northrop Grumman Systems Corporation Dba Electronic Systems
5110-01-123-1141 INTERCHANGEABLE
Blade,knife
4310-01-443-5427X-8 INTERCHANGEABLE
Compressor,reciprocating
Quincy Compressor Division of Coltec Industries Inc Dba Quincy Compressor Div Quincy Compressor
5965-01-690-5828X8 INTERCHANGEABLE
Loudspeaker Assembly
L-Acoustics Us Llc
4140-01-698-3205X-8 INTERCHANGEABLE
Fan,tubeaxial
Xpower Manfacture Inc.
Cross-Reference Index
Part NumberManufacturer
990C347 Northrop Grumman Systems Corporation Dba Electronic Systems (USA)
X8 Liftec Inc Div Liftec, Inc. (USA)
Related Parts
6685-00-006-7915INTERCHANGEABLE
THERMOMETER,INDICATING,CAPILLARY
K25140
5340-00-467-3734INTERCHANGEABLE
CLAMP,LOOP
U400
6685-00-832-8767INTERCHANGEABLE
THERMOMETER,INDICATING,CAPILLARY
6685-00-894-3188INTERCHANGEABLE
THERMOMETER,INDICATING,CAPILLARY
6685-00-900-3723INTERCHANGEABLE
THERMOMETER,INDICATING,CAPILLARY
6685-01-037-1132INTERCHANGEABLE
THERMOMETER,INDICATING,CAPILLARY
990C347H01
5110-01-123-1141INTERCHANGEABLE
BLADE,KNIFE
4310-01-443-5427INTERCHANGEABLE
COMPRESSOR,RECIPROCATING
X-8
5965-01-690-5828INTERCHANGEABLE
LOUDSPEAKER ASSEMBLY
X8
4140-01-698-3205INTERCHANGEABLE
FAN,TUBEAXIAL
X-8

Frequently Asked Questions

What is NSN 6685-00-261-9858?

NSN 6685-00-261-9858 is a Thermometer,indicating,capillary, manufactured by Northrop Grumman Systems Corporation Dba Electronic Systems, classified under FSC 6685 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6685-00-261-9858?

NSN 6685-00-261-9858 has 2 cross-referenced part numbers: 990C347 (Northrop Grumman Systems Corporation Dba Electronic Systems), X8 (Liftec Inc Div Liftec, Inc.).

What NSN replaces 6685-00-261-9858?

There are 10 known substitutes for 6685-00-261-9858: 6685-00-006-7915, 5340-00-467-3734, 6685-00-832-8767 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 990C347?

Key specifications for 990C347: Scale Type: CONCENTRIC DIAL; Case Type: CORROSION RESISTANT; Scale Smallest Increment: 2.0 DEG FAHRENHEIT; Material: BRASS BULB. 22 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6685-00-261-9858 still in active supply?

NSN 6685-00-261-9858 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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