PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

K2555Thermometer,indicating,capillary

Ferritronics Ltd · NSN 6685-01-071-7520 · FSC 6685 · No Item Name Available
Verified by PartsTable
NSN 6685-01-071-7520 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-071-7520. Primary manufacturer part number: K2555.
Features
  • Thermometer,indicating,capillary — FSC 6685
  • Scale Measurement Range: +30.000 TO 200.000 DEG FAHRENHEIT
  • Bulb Type: FLEXIBLE CAPILLARY
  • Material: BRASS BULB
  • Pointer/pen Type and Quantity: 1 INDICATING SINGLE
  • Dial Diameter: 2.812 INCHES NOMINAL IN
  • Bulb Quantity: 1
  • Actuating Medium: MANUFACTURER TRADE SECRET
Applications
  • Applications requiring Brass Bulb construction
General Description

The Thermometer,indicating,capillary, cataloged under National Stock Number 6685-01-071-7520, is classified within Federal Supply Class 6685 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Ferritronics Ltd. Government technical data includes 14 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN6685-01-071-7520
Primary Part NumberK2555
Item NameThermometer,indicating,capillary
FSC / FSG6685 / 66 — No Item Name Available
ManufacturerFerritronics Ltd
StatusACTIVE
Scale Measurement Range+30.000 TO 200.000 DEG FAHRENHEIT
Bulb TypeFLEXIBLE CAPILLARY
MaterialBRASS BULB
Pointer/pen Type and Quantity1 INDICATING SINGLE
Dial Diameter2.812 INCHES NOMINAL IN
Bulb Quantity1
Actuating MediumMANUFACTURER TRADE SECRET
Active Portion Length3.000 INCHES NOMINAL IN
Indicator Connection MethodFLEXIBLE TUBE
Scale Accuracy RatingPLUS OR MINUS 1 DIVISION FULL SCALE
Scale Inscription/background ColorBLACK MARKINGS ON WHITE BACKGROUND
Bulb Connection TypeUNION
Scale TypeDIAL
Flexible Tube Length72.000 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
6685-00-936-6040K25150 INTERCHANGEABLE
Thermometer,indicating,capillary
Tempco Inc Dba Marshalltown Tempco
Cross-Reference Index
Part NumberManufacturer
K2555 Ferritronics Ltd (CAN)
100326-01 Raytheon Technical Services Company (USA)
Related Parts
6685-00-936-6040INTERCHANGEABLE
THERMOMETER,INDICATING,CAPILLARY
K25150

Frequently Asked Questions

What is NSN 6685-01-071-7520?

NSN 6685-01-071-7520 is a Thermometer,indicating,capillary, manufactured by Ferritronics Ltd, classified under FSC 6685 (No Item Name Available). Status: active.

What are the part numbers for NSN 6685-01-071-7520?

NSN 6685-01-071-7520 has 2 cross-referenced part numbers: K2555 (Ferritronics Ltd), 100326-01 (Raytheon Technical Services Company).

What NSN replaces 6685-01-071-7520?

There is 1 known substitute for 6685-01-071-7520: 6685-00-936-6040. Verify interchangeability with system specifications before substitution.

What are the specifications of K2555?

Key specifications for K2555: Scale Measurement Range: +30.000 TO 200.000 DEG FAHRENHEIT; Bulb Type: FLEXIBLE CAPILLARY; Material: BRASS BULB; Pointer/pen Type and Quantity: 1 INDICATING SINGLE. 14 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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